Accounting Ethics Research Paper Topics

<h1>Accounting Ethics Research Paper Topics</h1><p>Accounting Ethics Research Paper Topics that Need Careful Study Before presenting a last draft of the examination paper, cautiously consider the best research subject so as to appropriately introduce your discoveries. It is essential to deliberately survey the subject before reviewing a paper for the production of your educators. You ought to decide to inquire about a fascinating theme with no exploration inclination, simultaneously having the option to introduce your outcomes in a way that is certain towards your paper topic.</p><p></p><p>The point ought to be the most legitimate and the simplest to get into and off of your mind, without you investing an excessive amount of energy in it, and you ought to have the investigative aptitudes to follow a bit by bit strategy to put your thought across appropriately. The decision of theme ought to be one that isn't excessively scholarly, yet assists with finding out about bookkeeping. This should be possible by searching for approaches to consolidate fascinating realities into your paper.</p><p></p><p>Of course there are numerous ways you can settle on the most proficient method to explore subjects for your own examination venture, however I suggest picking a point that will be intriguing but testing simultaneously. An intriguing point can help push your theme into the cutting edge of the internet searcher results when you explore this subject. With this component, you will run over numerous articles composed on this subject, making your exploration simpler. You may even wind up picking a theme that has been done previously, which will assist with moving your paper forward.</p><p></p><p>Even on the off chance that you have picked a previously investigated article subject, you will in any case need to peruse that article to ensure that it is sufficiently new to be remembered for a n all the more elegantly composed research paper. Remember that your picked theme must be founded on a fascinating idea that will remain new in the brains of your readers.</p><p></p><p>One significant part of exploring subjects is ensuring that the source material is right. You should inquire about the source material, the standards and the guidelines for the point, the rules that administer the theme, and the distinctive wording utilized for the subject. When you have done this, it will be anything but difficult to track down books or other reference materials that will assist you with exploring the subject. Utilize these reference materials related to the book you will use in your examination paper.</p><p></p><p>Researching points isn't simple, however there are numerous sources accessible to help you. With this being stated, there are three kinds of individuals that I have found who work superbly of investigating and composing their own exploration papers:</p><p></p><p>Good Choice For Accounting Students: This is an asset for you in the event that you are thinking about a profession in bookkeeping. There are numerous assets that they have accessible to you, which incorporate practice tests, practice tests, and test guides. These books assist you with working through the ideas in the study hall and can be utilized to assist you with understanding the ideas and strategies that are introduced to you in class.</p><p></p><p>An Excellent Tool For Accounting Students: This asset is utilized in most bookkeeping classes the world over. This asset incorporates assets for both the homeroom and the online use. A great deal of bookkeeping understudies like to utilize this asset, as it is effectively open, and gives an abundance of data to the student.</p>

The Best List of Essay Topics For High School Students

<h1>The Best List of Essay Topics For High School Students</h1><p>What is the best rundown of exposition points for secondary school understudies? This is an inquiry that is commonly posed of the individuals who are contemplating, perusing and composing for school. It is particularly helpful for the individuals who are composing a research project. The inquiry turns out to be much progressively significant when you consider that there are a few paper themes for secondary school students.</p><p></p><p>Some individuals accept that the best rundown of exposition points for secondary school understudies comprises of the subjects that have been instructed at school. Despite the fact that this is the situation, there are different themes which have been conceived by specialists for this very reason. These subjects are generally helpful for the individuals who are scanning for approaches to get into school and to make it simpler for them to get into a school or college. These are difficult subjects for the individuals who have quite recently been instructed about them.</p><p></p><p>Some points have been separated into areas, for example, the historical backdrop of thoughts, current thoughts, change, singular activity, discourse and the brain, brain science, church and government, the world, and verse. Also, there are other sub points that can be investigated on. These incorporate perusing to cause you to get the hang of, getting individuals to learn, books and help, composing and sonnets, and PC innovation. Every one of these subjects has explicit advantages for understudies who are attempting to ace them.</p><p></p><p>Students ought to likewise realize that there are as of now many article points which can be planned by the individual likes and needs of every understudy. In any case, the best rundown of paper subjects for secondary school understudies does exclude a few article points that are intended for understudies who are attempting to assemble a decent future and change the lives of people around them. Such article themes might be exceptionally helpful, however on the off chance that they are planned by the individuals who are not keen on training, they will be of no utilization. Despite the fact that it may not appear it, the best article themes for secondary school understudies ought to likewise incorporate subjects, for example, school arranging, profession arranging, getting into the workforce, beginning a business, monetary arranging, improving one's life, and vocation guidance.</p><p></p><p>Although the best rundown of paper points for secondary school understudies is made out of certain themes that are amazingly valuable, it isn't astute to follow just a rundown of subjects which have been intended to be useful to the individuals who are attempting to transform them. It might be enticing to find out about a portion of t he points which are generally offered in the best exposition subjects for secondary school understudies, however this ought not be finished. You ought to likewise think about that it is conceivable to compose numerous different papers on subjects that are hard to be managed when attempting to get ready for school or university.</p><p></p><p>The best rundown of article points for secondary school understudies may incorporate a few subjects, however it ought not just incorporate themes which are anything but difficult to use in class. These points ought to likewise incorporate subjects which are useful for the individuals who are not scholastically slanted and are attempting to apply them in their lives. The best paper points for secondary school understudies ought to likewise incorporate subjects which are not excessively difficult.</p><p></p><p>The rundown of article themes for secondary school understudies isn't composed to be complet e. It is composed to be helpful for the individuals who are attempting to get into school or college, and for the individuals who are intending to begin a business. In the event that you read a rundown of paper points for secondary school understudies which incorporates everything that can be thought about the subject, you will miss out on the whole course of the school year.</p>

African Americans in Colonial America - Research Paper Topics

African Americans in Colonial America - Research Paper TopicsAfrican Americans and the history of slavery are often the subject of college research papers. These papers are meant to be read by a wide range of students, from students who are not from the United States. Students who have done their research outside of the United States may feel intimidated or uncomfortable discussing such issues, but their ideas should be respected. In order to protect the privacy of the individuals involved, some of the research mentioned in this article has been altered or edited for the sake of this article.The Census Reports: The Census reports contain statistics about racial groups that were enslaved during the era of slavery. African Americans are listed separately in most cities' indexes for the purposes of obtaining this information. In order to make them available to students, researchers must either visit the census offices themselves or obtain copies from libraries and government agencies th at maintain archives. Before taking the time to get the statistics, students should examine the documents carefully to ensure accuracy and to get an idea of what the information contains.The Slavery Statements: These are written statements made by former slaves who were interviewed after their release from bondage. The statements include details about their enslavement experiences, including the conditions they experienced and how they escaped. The writers of these statements also share their perspectives on racism and slavery. Many historians view the statements as important evidence about African American life in colonial America.The Slave Pensions: There are records from several plantations that detail the wages of slave laborers and plantation workers. Some of these records date back to the 1700s, while others cover much longer periods of time. Those that deal with plantation owners are often limited in their number of numbers and may not be available to many students. Because p lantation owners were responsible for paying their workers, they can provide some valuable information regarding conditions on plantations and in the fields.The Census of 1790: The Census was the first attempt to record the status of African Americans. Though only black men and women were included in the original count, the Federal Government soon added other racial groups. More than seventy years later, the census was extended to include Puerto Ricans, Native Americans, and Asian Americans. This was a substantial change for an already complex and controversial subject.Census Files: The main source of census information is the official U.S. census. As a result, researchers should not assume that all information in the census files is accurate. While all information in the files is publicly available, it is difficult to obtain specific information that would be helpful to students who are writing a research paper. However, it is possible to find 'census directories' that contain deta ils about particular census counts.Plantation Workers: In addition to the census files, plantation workers also provide useful information to researchers. Plantation workers often volunteered to participate in the census and many reports contain their stories. In addition, plantation owners often provided detailed reports to the Census Department. In addition to the main data that are publicly available, researchers should also consult with experts who specialize in plantation histories.Interviews: Interviews with plantation workers have proved to be a valuable source of information. Stories can provide insight into conditions that were prevalent on the plantations and in the fields. Another benefit of interviewing plantation workers is that these workers often express gratitude for the things that others give them. Therefore, interviewees may be able to provide important information about the lives of African Americans in colonial America.

Essay Topics For A Long Way Gone

Essay Topics For A Long Way GoneThe essay topics for a long way gone are critical components to an appropriate college career. Most students in college write short essays to present their views and experiences to the community. But, they often fail to follow the basic guidelines of essay writing that assist in the creation of long-lasting work. Essay topics for a long way gone is one of the main considerations in selecting your essay topic.The first step to writing is to determine the type of writing that you are going to do. Are you going to be writing on a personal or academic level? Will you be presenting your thesis? What are you going to use the essay as your first introduction to the essay writing material? These questions will guide you in creating the essay topics for a long way gone that is going to meet all of your needs.After you have decided to write your essays on the topics of your choice, you must find a topic that fits the type of essay that you are working on. This c an be a challenge, but it is an essential step in developing your essay. You need to decide what level of analysis is going to be the focus of your essay. You may want to research past topics related to your topic. You may have forgotten some important details in your history. You may want to take a look at a few essays that discuss your topic to gain inspiration for your own piece.Creating the essay topics for a long way gone should be a hands-on process. You need to spend time on coming up with ideas and topics to better suit your writing style. This can include using dictionaries to gather relevant information from many different sources. If you can use this free writing resource, you are well on your way to having your essay ready to submit to the college admissions committee in no time.You should not overlook the importance of length when you are making your essay topics for a long way gone. When you are writing an essay of this length, it is imperative that you use a variety o f perspectives and concepts to expand upon the information that you have already covered. In doing so, you will allow the information to become stronger by presenting a variety of views on your topic. Because of this, it is vital that you keep your topic brief. You do not want to get bogged down in a topic that is too lengthy for you to keep up with.After you create the essay topics for a long way gone, you are well on your way to preparing yourself for college. Writing is a necessary element of a well-planned education. There are countless opportunities in an education field. You can choose to stay in school to earn your college degree, enter the workforce, or pursue other interests. In all of these situations, you will need to create the essay topics for a long way gone that will help you gain the position you desire.Essay topics for a long way gone are essential tools in gaining success with any career goal. They allow you to fill out the short section of the essay and explore a broad range of subject areas. They also allow you to have the potential to present your opinion in a meaningful manner. They are extremely important to writing in general. They can make your life a little easier, but they are essential.

Compare Contrast Religion Essay - 1100 Words

Comparisons and Contrasts between Christianity, Islam, and Judaism Between the religions of Christianity, Islam, and Judaism, there are many similarities and differences that are dealt within each of them. Throughout these religions, we can compare and contrast different aspects of each religion such as some of the basic facts of their histories and some of the religious beliefs each of them have in common and or make them different from each other. In the country known as Palestine, the religions known as Christianity and Judaism were founded each by different men. Jesus was the man who began the creation of Christianity and a man named Moses was the founder who established the religion of Judaism. In the country of Saudi Arabia the†¦show more content†¦Priests, Bishops, Ministers and Pastors are all measured as the clergy of the Christian religion. Christians hold there main day of worship on Sunday at a place known as a Church, Cathedral, or Chapel. At a Jewish house of w orship, also known as a Synagogue, a Rabbi would host their day of devotion to their religion on a Saturday. Muslims meet every Friday of the week at place of commitment to their belief at a place called the Mosque which is hosted by an Imam. Between the 3 of the religions, Christianity, Judaism, and Islam are all known to be monotheistic which means they all believe in only one god. As for each of them they all believe that they’re â€Å"God† is the origin and source of all that exists. In the religious views of the Jews, each of them believes that there is to be one God who cannot be made up of parts. Muslims believe in an â€Å"invisible God,† a god to be intensely feared through his supremacy. This God was not able to have children in which to the Muslims he is described as an â€Å"Ultimate God.† Christians hold fast to the trinity of the Father, the Son, and the Holy Spirit. 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Atticus Finch, a Father and Teacher free essay sample

Harper Lee’s To Kill A Mockingbird is full of life lessons and influential figures as siblings Jem and Scout grow up without a mother. As a single parent raising Scout and Jem, it is their father Atticus Finch who influences the children most. Atticus challenges them to be better people and helps them to discover many important life lessons. Some of these include not judging a book by its cover, compromising and keeping your head high and fists down. These lessons play a crucial part of Jem and Scouts’ growth into young adults and allow them to stay strong during the controversial trial of Tom Robinson. One of the first lessons Atticus teaches Scout is compromise He promises that â€Å"If [she] concedes the necessity of going to school, [they’ll] go on reading just as [they] always have. † (Lee 31) Atticus knows Scout is fond of him reading to her, so takes advantage of the situation, not only to convince Scout to go to school, but also to teach her how to compromise. We will write a custom essay sample on Atticus Finch, a Father and Teacher or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Someone who did not know Scout as well as her father does would not have seen this unique solution or been able to explain the concept to her as well as her father could. Scout’s disastrous first day at school proves to be a flop but is full of valuable teachable moments for Atticus. During the very same conversation† Atticus teaches Scout not to judge a book by its cover. (†Ã¢â‚¬â„¢First of all’ he said, ‘if you can learn a simple trick, Scout, you’ll get along better with all kinds of folks. You never really understand a person until you consider things from his point of view. ’ ‘Sir? ’ ‘Until you climb into his skin and walk around in it:’† (Lee 30) This lesson helps Scout to get along better with her teacher while teaching her to be more understanding of other peoples situations as she exams situations from their point of view. This is not the only time Atticus has to address Scout’s volatile personality, and how it comes out in public. Nor is it the only tie he uses it to teach her a lesson. Atticus again has to address Scouts aggressive behavior after she gives Cecil Jacobs a bloody nose while defending Atticus’s name. This is not the first time Atticus has had to talk to Scout about fighting, but unlike other times, He take the opportunity to teach her a lesson, which sticks with her more than just a simple scolding ever could. He tells her that â€Å"[She] might hear some ugly talk about his [defense of Tom Robinson] at school, but to do one thing for [him] if [she] will: [to] just hold [her] head high and keep those fists down. No matter what anyone says to [her], don’t †¦ let ‘em get [her] goat. † (Lee 76) By asking her to do it for him, Atticus makes a stronger impression on her than threats over could. Scout would take a punishment if it meant standing up for Atticus, but she wouldn’t do anything to disappoint or break a promise with her father. Atticus knows this, and uses it to his benefit to make sure Scout does not get into trouble. Given his situation as Tom Robinson’s lawyer, this is one of the most important lessons he could ever teach Scout. Harper Lee’s To Kill a Mockingbird shows Atticus teaching not only Scout valuable lessons, but also the reader too. Lessons such as compromise, not to judge a book by its cover and to use our words not our fists. These valuable lessons are learnt in our youth but often forgotten, as we grow older. Atticus Finch influences his children in such a way that they will never forget these vital life lessons. Lesson we can all learn and live by!

Investigation into the Effect of Concentration on Rate of Reaction between Marble Chips and Acid Essay Example

Investigation into the Effect of Concentration on Rate of Reaction between Marble Chips and Acid Essay Before carrying out a set of experiments, I decided to do preliminary work to look at quantities and measurements, in order for my experiments to work smoothly and accurately. To do this, I tested both amounts of marble chips and amounts and concentration ranges of acid. I also experimented with different measuring cylinder sizes. I carried out a few simple experiments varying the above, and came up with the most sensible.We began by what seemed the most practical quantities. Firstly we looked at marble chips. We took 5g as a starting example. To accompany this we looked at what would be a sensible amount of liquid to accompany it and chose 50ml. To find the right measuring cylinder to use, we set up a mock experiment and began with a 25ml measuring cylinder. We timed experiments for both the strongest and weakest concentrations of acid and recorded the following results.50ml acid0ml water = 26.80 seconds10ml acid40ml water = 2 minutes, 53.77 secondsThese were both practical results and so we were happy with the size of the measuring cylinder. Along with this, we also took note at how our quantities of acid and marble chips worked together and saw that they were both satisfactory. All other equipment and the set up of the apparatus were also fine and so we decided to move on to the proper experiments.Planning My WorkFor this experiment I will need to investigate how the rate of reaction of marble chips is effected by acid as well as considering other factors that my have an effect.Aim: To find a relationship between the concentration of acid and the rate of which a reaction takes place with marble chips.To begin the experiment, I need to look at the chemistry of marble chips (calcium carbonate) and acid and so I will begin with their equations.Word equation:calcium carbonate + hydrochloric acid calcium chloride + water + carbon dioxideChemical equation:CaCo3(s) + 2HCl(aq) CaCl2(aq) + H2O(l) + CO2(g)When the reaction takes place, carbon dioxide, water and salt will be produced. Out of these three, I have chosen carbon dioxide as the one to measure for my rate of reaction. This is because it will be the easiest and most noticeable to collect. By the measurement of the carbon dioxide, we will be able to accurately follow how fast the reaction occurs. Pg 190 of the Chemistry for you book, shows a sensible, simple and accurate way of measuring a gas like carbon dioxide, in an upturned measuring cylinder filled with water. If we place marble chips and acid in a conical flask, the gas will bubble through a delivery tube lowering the level of water, which we will then be able to time until all water has left the cylinder.The amount of time it takes for the gas to fill the measuring cylinder will show us how much carbon dioxide has been given off and so will show us the rate of reaction. Rate of reaction is altered by three main things. One is SURFACE AREA. This will relate to the surface area of our marble chips. The finer the chips, the larger the surface area, and so the larger the rate of reaction. However, we are intending to keep the surface area the same. Another factor is TEMPERATURE. Again, we are not going to alter the temperature. If we were to, the hotter the temperature, the faster the rate of reaction as the molecules would have more energy. The other is CONCENTRATION. This relates to the concentration of the acid and is what we will use as our variable.The acid particles can only react with the marble chips when they collide, as seen in the diagrams.The acid particles move randomly through the water. As you increase the concentration of the acid, there are more acid particles in the same volume. Therefore there is a greater chance of acid particles colliding, and reacting, with particles on the surface of the marble and you increase the rate of reaction.This is what I will use in my experiment. The concentration of acid is written in Molars. For example, 1M (molar) is half the concentration of 2M. I will alt er the concentration to see what effect it has on the rate of reaction.Predictions:I predict that when investigation the effect of concentration on rate of reaction between marble chips and acid, that an alteration in concentration will effect the rate of reaction in a pattern. As has already been explained, as you increase the concentration of the acid, there are more acid particles in the same volume and so therefore there is a greater chance of acid particles colliding, and reacting, with particles on the surface of the marble. Because of this, I will make the prediction that the higher the concentration of acid, the faster the rate of reaction with the marble chips and the faster my measuring cylinder will fill with carbon dioxide.I also predict a more detailed pattern. I predict that the level of concentration may also have a direct effect on the rate of reaction. E.g. that if a 2M was compared with a 1M acid which is half the concentration, the rate of reaction will also be ha lf. I will now need to carry out my experiment to test these predictions.My ExperimentDiagram:Apparatus:Conical flask to hold the marble chips and acid for the experiment50ml measuring cylinder to measure the volume of acid being used in the experiment. I chose 50ml volume because that is the maximum acid we will need.Delivery tube and bung will transport C02 given offWeighing pot to hold the marble chips for weighing25ml measuring cylinder to collect the C02 given off by the experiment. I chose 25ml because it was the most sensible sizeBalance reading to 0.01g, must be accurate, to weigh the marble chipsWater trough to hold the water for the collection of C02Stop clock reading to 0.01 of a second, to accurately time the collection of C02 and the rate of the reactionMethod:Each time the variable is altered, I shall carry out exactly the same experiment, merely with a different concentration.* I will begin by collecting and setting up all my equipment. I need to make sure tha t the chonical flask is clean and doesnt have any substances already in it. The 25ml measuring cylinder needs to be filled with water. We found that if we filled a 25ml measuring cylinder, due to excess volume above the measurements, it actually held a total of 40ml. We found this by completely filling the cylinder as we would in the experiment, and then pouring this into a larger measuring cylinder and taking the reading. The cylinder then needs to be stood upside down in the trough that also needs to have an ample amount of water in. The delivery tube needs to be under the cylinder but does not yet need to have the bung in the flask.* The marble chips then need to be weighed accurately, remembering to take into account the surface area. These can then be put into the flask.* I will then prepare my acid to the right concentration. The amount of acid needs to be measured accurately in the separate, 50ml measuring cylinder and then water needs to be added, if required, to dilute the acid to the right concentration.* The acid can then be added to the flask and marble chips. The bung needs to be put in the flask immediately, and as soon as this is done I will begin the stop clock.* I will then watch the flask carefully and as soon as the first bubble comes out of the measuring cylinder, will stop the stop clock and take my reading.This will be carried out for each experiment. In-between, it is important to rinse and dry the chonical flask and to refill the 25ml measuring cylinder.After obtaining a complete set of results, I will then go through the process again to repeat my experiments. This will give me added information and will help explain anything out of place if necessary.Concentrations and Readings:I am going to carryout five experiments, and then repeat these to give me a total of 10 results, two for each experiment. The experiments I will carry out will be of five different concentrations of acid. Along with the concentrations in ml of both acid and wat er, I have written along with it the concentrations in molar (M). (Our original strength of acid is 2M) The concentrations will be:Acid (ml)Water (ml)CalculationMolar (M)5002 x 5/5 = M240102 x 4/5 = M1.630202 x 3/5 = M1.220102 x 2/5 = M0.810402 x 1/5 = M0.4We see that in this experiment, 2M will be the strongest acid, 0.4 will be the weakest. The way that the amount of ml is always equal to 50ml means though the concentrations change, the volume of liquid will be kept the same.Fair Test:It is very important to make my experiment fair. If it is not kept exact, then my results may easily be altered by slight differences that shouldnt occur.In order to keep my experiment fair, I will ensure that there is only one variable at any time. My variable will be the concentration of acid to water. Other possible variables such as the amount of liquid, temperature, amount of marble chips or surface area of marble chips should never change and should always stay the same. To do this, we will kee p the volume of liquid the same by measuring accurately in an accurate measuring cylinder. The amount of marble chips will be kept same by weighing them on accurate weighing scales. The surface area of the chips will be harder to keep accurate. We can do this generally by attempting to keep the marble chips of similar sizes as accurately as possible. I have decided to use small marble chips rather than large so that the surface areas are more similar. However, this may not always be completely accurate, and so we will have to take this into account and remember this when looking at results. We will monitor temperature with a thermometer, but will work to room temperature. We will not be able to alter the temperature as we please, and so will take a note of the temperatures for each experiment so that we can explain any changes of patterns in our results.It is also important not to change apparatus or equipment and to keep the experiment exactly the same.If this is kept to then my ex periment will be fair, hopefully giving me the most accurate results as possible.Safe Test:Keeping a safe test is also very important for the safety of me and other people around me. To ensure that my experiment is safe, I will carry out the following precautions.* Goggles should be warn to protect my eyes from acid or in case another accident occurred* I should act in a sensible and safe manner, carefully working with the equipment and being aware of any dangers.* The low concentration of acid I will use is a safety precaution to ensure that the acid is not dangerous.Obtaining My EvidenceTo obtain my evidence, I began by setting up my equipment and following the plan previously written. I measured hydrochloric acid (HCl) with water to produce the 50ml volume of the desired concentration, and added to this, 5g of small marble chips. I timed, in seconds, how long this took to produce a 45ml3 of gas by bubbling it through a delivery tube into an upturned mea-suring cylinder of water. The volume of which was 45ml. (All this is explained in more detailed in my plan). I included certain apparatus for accuracy. The reaction was timed accurately by using a stop clock measuring to 100th of a second. The scales measured the marble accurately by measuring exact to 0.01g. This accuracy of this was also improved by using small marble chips with more similar surface areas. The measuring cylinders used all measured to 0.1ml.From carrying out this process, I produced a set of results for 5 concentrations of acid, 2M, 1.6M, 1.2M, 0.8M and 0.4M. I then repeated these results for even more accuracy so that I will be able to produce an average.Results:The results for both the first set of experiments and the repeated, second set of experiments have been combined into one table. The column of Concentration, is measured in Molars (M). This is the volume of hydrochloric acid (HCl) and water (both measured in cm3) shown together. Time 1 and Time 2 are the times (in seconds) for expe riment 1, and the repeats, experiment 2.Other information that I also took, was a note of the room temperature at the time of taking the results. The results of experiment 1 and experiment two were taken on different days and so this was important information. I already know that temperature is an altering factor in rate of reaction and so if the temperature if not the same then it is important to know so that a change in results can be explained.Experiment 1 temperature 200CExperiment 2 temperature 190CThe first lots of experiments were taken at a temperature 10C higher than the second lot of experiments. This needs to be known to explain any patterns that may be related.Table of My Results:HCl (cm3)Water (cm3)Concentration (Molar)Time 1 (seconds)Time 2 (seconds)500213.0113.0740101.617.2713.3030201.227.3022.5120300.844.3732.4910400.4215.12186.22Analysing My Evidence and Drawing ConclusionsFrom my table of results, I can calculate additional information. I can work out an average ti me by adding the two existing times and dividing them by two. I can then find a rate of each reaction by dividing 1 by the average time. This will give me another pattern to follow by showing me how fast the reaction went at the different concentrations. The formulas for these are:Average = time + time / 2Reaction = 1 / timeI am going to add the answers of these as additional columns onto my table.HCl (cm3)Water (cm3)Concentration (Molar)Time 1 (seconds)Time 2 (seconds)Average Time (seconds)Rate500213.0113.0713.040.76740101.617.2713.3015.290.06530201.227.3022.5125.310.0420300.844.3732.4938.430.02610400.4215.12186.22200.670.005From the table, without the average time, we can see a common difference between the time in experiment one and the time in experiment two. All results for experiment 1 are slightly quicker than the times for experiment two (with exception of the 2M experiment). We can relate this back to the temperature difference. Temperature affects the rate of reaction. Whe n particles are heated up, they have more energy. They move around more quickly. As they travel faster, there are more collisions in a certain time. As well as this, with more energy, more collisions are likely to result in a reaction. Therefore, as temperatures are raised, reactions get faster and more likely, increasing the rate of reaction.I noted when obtaining my results how the room temperature at the time experiment 1 was being carried out was 200C, where as experiment 2 was at 190C. This means that experiment 1, having the higher temperature, would have shown a faster rate of reaction, which is exactly what is shown in the table.This is apart from the reading for the highest concentration, the 2M experiment. Here we see that the time in experiment 2 is faster than that in experiemnt1. However, this is by 0.06 of a second. Here human reaction time may be a factor. Although the stop clocks are very accurate, they will never be exact, as it is very hard to stop the clock exactl y at the time you want it to. This error may have led to this small difference. By noticing this here, we can also take it into account for the other experiments, remembering that they are not exact but only by a very small error.The average helps to even out the differing results which means that one, middle number is produced to work with. Because, also, I have no obvious anomalous results, readings that dont fit the pattern of the higher the concentration, the faster the reaction and so the shorter the time, the averages will follow the same trend.To look more closely at my data, I am going to enter my average times onto a line graph. I think this is the best type of graph to use as it fits my results of continuous date and will show any trends clearly. This is on the next page (graph 1). The concentration in molars is along the x-axis, the time of the reaction in seconds is along the y-axis. I have plotted my recorded points and drawn a curved line of best fit.From this data I c an now say that the concentration does effect the rate of reaction. The line of best fit shows very clearly, a definite trend that as you increase the concentration, you decrease the time taken, showing an increase in speed. Rate and time are inversely related. As one increases the other decreases, as seen on the graph, meaning that as time increases, rate of reaction decreases.What we see on the graph is a sharp decrease from about 200 seconds to about 50 seconds over a concentration range of only 0.3M showing fast reactions. Over another 11M there is a much more gradual decrease as it slows down, only covering approximately a range of 49 seconds. The remaining range of 2M covers 1 second and appears to be reaching a level line.The second graph (graph 2 over the page), again a line graph, is using the rate I worked out in the table, against the concentration. This gives us I more direct trend towards the effect of concentration on rate of reaction. It shows very definitely and clea rly that the higher the concentration, the higher the rate. As rate and time are inverse, I would expect an almost mirror of the concentration against time graph. This is what has happened. Instead of a sharp decrease followed by a gradual decrease as seen in the concentration against time graph, the concentration against rate graph shows a gradual increase followed by a sharp increase. My line of best fit covers 1.4M at a 0.05 rate very gradually, then a slight increase, and then over 1M, the rate increases by 0.567.My prediction before carrying out this experiment was that the higher the concentration of acid, the faster the rate of reaction. Both these graphs prove this to be correct. This is due to the activity of the molecules in the experiment. The rate of reaction is the amount of a substance that takes part in a chemical reaction in a given time. In order to react, the particles must collide with each other. If the rate of reaction is increasing, it is the amount of particle s colliding and therefore reacting that is increasing. As we increase the concentration of acid, the substance taking part in the chemical reaction (along with marble chips), the rate of reaction increases. This is because an increase in concentration increases the amount of collisions taking place. With more particles in the same volume, there is a greater and more common likely hood of collisions taking place. This is why concentration effects rate of reaction.The second part of my prediction was more detailed. I predicted that the level of concentration may also have a direct effect on the rate of reaction, meaning that if the reaction of a 2M acid was compared with that of a 1M acid, which is half the concentration, the rate of reaction will also be half.I looked at my graph of concentration against rate to investigate this. I used the examples of 1M and 2M and took the following readings of my graph and line of best fit.1M = rate of 0.032M = rate of 0.72This shows my prediction to be very incorrect. If it would be true, then my graph would show a straight line of equal increase. However, my line of best fit gradually increases, going against my prediction.From my results I can conclude that the rate of reaction between marble chips and acid is increased by an increase in concentration.EvaluationLooking back on the experiment, I think that I have carried out successful, dependable procedure that has given me precise and reliable evidence and results. First I will look at the practical work that I did. When doing the practical work, I followed my plan accurately. I kept it a safe and fair test and this is important. I experiment I planned was easy to carry out. Problems arose in temperature. The only variable was meant to be concentration, but due to uncontrollable circumstances, room temperature did alter. Luckily this occurred between sets of experiments which gave me additional information to look into. However, if that had happen part way through a set of results my results may have been slightly more irregular. To overcome this problem, results could have been taken all in one go. However, this was not practical in the spaces of time we were able to have. The other variable of surface area appeared to de successful. We already took precautions over this by using small marble chips instead of large, and so no problems arose.The accuracy of my results is as accurate as I think I would need. From my results I have produced graphs that show very definite and visible trends and patterns and no anomalous results and so the readings must have been correct. It may be possible to improve accuracy. I learnt from the strongest concentration, the 2M acid and the fastest reaction, that for short spaces of time the accuracy is not as exact. This could be solved by an alteration in equipment. If I were to do the experiment again, I would use a larger upturned measuring cylinder. The one I used held 45ml3 of solution. I found this took roughly 1 3 seconds to fill with gas, making it slightly inaccurate because it was a small space of time. However, if we increase the volume of the cylinder, it would take a longer time period. This may have improved accuracy. Other equipment all proved fine. I had no troubles with any other pieces of apparatus and would not alter them.To look into this investigation further of how concentration alters rate of reaction, I would like to look into concentration of solids in a reaction and concentrations of gases, similar to how we look at concentration of liquid and acid. It will be interesting to see if gases for instance have the same reaction patterns as liquids. I can see that my results mean that an increase of concentration of acid increases the rate. Would an increase of concentration of gas make any difference in the rate of reaction? This would help to add to an overall conclusion to the investigation. Investigation into the Effect of Concentration on Rate of Reaction between Marble Chips and Acid Essay Example Investigation into the Effect of Concentration on Rate of Reaction between Marble Chips and Acid Essay Before carrying out a set of experiments, I decided to do preliminary work to look at quantities and measurements, in order for my experiments to work smoothly and accurately. To do this, I tested both amounts of marble chips and amounts and concentration ranges of acid. I also experimented with different measuring cylinder sizes. I carried out a few simple experiments varying the above, and came up with the most sensible.We began by what seemed the most practical quantities. Firstly we looked at marble chips. We took 5g as a starting example. To accompany this we looked at what would be a sensible amount of liquid to accompany it and chose 50ml. To find the right measuring cylinder to use, we set up a mock experiment and began with a 25ml measuring cylinder. We timed experiments for both the strongest and weakest concentrations of acid and recorded the following results.50ml acid0ml water = 26.80 seconds10ml acid40ml water = 2 minutes, 53.77 secondsThese were both practical results and so we were happy with the size of the measuring cylinder. Along with this, we also took note at how our quantities of acid and marble chips worked together and saw that they were both satisfactory. All other equipment and the set up of the apparatus were also fine and so we decided to move on to the proper experiments.Planning My WorkFor this experiment I will need to investigate how the rate of reaction of marble chips is effected by acid as well as considering other factors that my have an effect.Aim: To find a relationship between the concentration of acid and the rate of which a reaction takes place with marble chips.To begin the experiment, I need to look at the chemistry of marble chips (calcium carbonate) and acid and so I will begin with their equations.Word equation:calcium carbonate + hydrochloric acid calcium chloride + water + carbon dioxideChemical equation:CaCo3(s) + 2HCl(aq) CaCl2(aq) + H2O(l) + CO2(g)When the reaction takes place, carbon dioxide, water and salt will be produced. Out of these three, I have chosen carbon dioxide as the one to measure for my rate of reaction. This is because it will be the easiest and most noticeable to collect. By the measurement of the carbon dioxide, we will be able to accurately follow how fast the reaction occurs. Pg 190 of the Chemistry for you book, shows a sensible, simple and accurate way of measuring a gas like carbon dioxide, in an upturned measuring cylinder filled with water. If we place marble chips and acid in a conical flask, the gas will bubble through a delivery tube lowering the level of water, which we will then be able to time until all water has left the cylinder.The amount of time it takes for the gas to fill the measuring cylinder will show us how much carbon dioxide has been given off and so will show us the rate of reaction. Rate of reaction is altered by three main things. One is SURFACE AREA. This will relate to the surface area of our marble chips. The finer the chips, the larger the surface area, and so the larger the rate of reaction. However, we are intending to keep the surface area the same. Another factor is TEMPERATURE. Again, we are not going to alter the temperature. If we were to, the hotter the temperature, the faster the rate of reaction as the molecules would have more energy. The other is CONCENTRATION. This relates to the concentration of the acid and is what we will use as our variable.The acid particles can only react with the marble chips when they collide, as seen in the diagrams.The acid particles move randomly through the water. As you increase the concentration of the acid, there are more acid particles in the same volume. Therefore there is a greater chance of acid particles colliding, and reacting, with particles on the surface of the marble and you increase the rate of reaction.This is what I will use in my experiment. The concentration of acid is written in Molars. For example, 1M (molar) is half the concentration of 2M. I will alt er the concentration to see what effect it has on the rate of reaction.Predictions:I predict that when investigation the effect of concentration on rate of reaction between marble chips and acid, that an alteration in concentration will effect the rate of reaction in a pattern. As has already been explained, as you increase the concentration of the acid, there are more acid particles in the same volume and so therefore there is a greater chance of acid particles colliding, and reacting, with particles on the surface of the marble. Because of this, I will make the prediction that the higher the concentration of acid, the faster the rate of reaction with the marble chips and the faster my measuring cylinder will fill with carbon dioxide.I also predict a more detailed pattern. I predict that the level of concentration may also have a direct effect on the rate of reaction. E.g. that if a 2M was compared with a 1M acid which is half the concentration, the rate of reaction will also be ha lf. I will now need to carry out my experiment to test these predictions.My ExperimentDiagram:Apparatus:Conical flask to hold the marble chips and acid for the experiment50ml measuring cylinder to measure the volume of acid being used in the experiment. I chose 50ml volume because that is the maximum acid we will need.Delivery tube and bung will transport C02 given offWeighing pot to hold the marble chips for weighing25ml measuring cylinder to collect the C02 given off by the experiment. I chose 25ml because it was the most sensible sizeBalance reading to 0.01g, must be accurate, to weigh the marble chipsWater trough to hold the water for the collection of C02Stop clock reading to 0.01 of a second, to accurately time the collection of C02 and the rate of the reactionMethod:Each time the variable is altered, I shall carry out exactly the same experiment, merely with a different concentration.* I will begin by collecting and setting up all my equipment. I need to make sure tha t the chonical flask is clean and doesnt have any substances already in it. The 25ml measuring cylinder needs to be filled with water. We found that if we filled a 25ml measuring cylinder, due to excess volume above the measurements, it actually held a total of 40ml. We found this by completely filling the cylinder as we would in the experiment, and then pouring this into a larger measuring cylinder and taking the reading. The cylinder then needs to be stood upside down in the trough that also needs to have an ample amount of water in. The delivery tube needs to be under the cylinder but does not yet need to have the bung in the flask.* The marble chips then need to be weighed accurately, remembering to take into account the surface area. These can then be put into the flask.* I will then prepare my acid to the right concentration. The amount of acid needs to be measured accurately in the separate, 50ml measuring cylinder and then water needs to be added, if required, to dilute the acid to the right concentration.* The acid can then be added to the flask and marble chips. The bung needs to be put in the flask immediately, and as soon as this is done I will begin the stop clock.* I will then watch the flask carefully and as soon as the first bubble comes out of the measuring cylinder, will stop the stop clock and take my reading.This will be carried out for each experiment. In-between, it is important to rinse and dry the chonical flask and to refill the 25ml measuring cylinder.After obtaining a complete set of results, I will then go through the process again to repeat my experiments. This will give me added information and will help explain anything out of place if necessary.Concentrations and Readings:I am going to carryout five experiments, and then repeat these to give me a total of 10 results, two for each experiment. The experiments I will carry out will be of five different concentrations of acid. Along with the concentrations in ml of both acid and wat er, I have written along with it the concentrations in molar (M). (Our original strength of acid is 2M) The concentrations will be:Acid (ml)Water (ml)CalculationMolar (M)5002 x 5/5 = M240102 x 4/5 = M1.630202 x 3/5 = M1.220102 x 2/5 = M0.810402 x 1/5 = M0.4We see that in this experiment, 2M will be the strongest acid, 0.4 will be the weakest. The way that the amount of ml is always equal to 50ml means though the concentrations change, the volume of liquid will be kept the same.Fair Test:It is very important to make my experiment fair. If it is not kept exact, then my results may easily be altered by slight differences that shouldnt occur.In order to keep my experiment fair, I will ensure that there is only one variable at any time. My variable will be the concentration of acid to water. Other possible variables such as the amount of liquid, temperature, amount of marble chips or surface area of marble chips should never change and should always stay the same. To do this, we will kee p the volume of liquid the same by measuring accurately in an accurate measuring cylinder. The amount of marble chips will be kept same by weighing them on accurate weighing scales. The surface area of the chips will be harder to keep accurate. We can do this generally by attempting to keep the marble chips of similar sizes as accurately as possible. I have decided to use small marble chips rather than large so that the surface areas are more similar. However, this may not always be completely accurate, and so we will have to take this into account and remember this when looking at results. We will monitor temperature with a thermometer, but will work to room temperature. We will not be able to alter the temperature as we please, and so will take a note of the temperatures for each experiment so that we can explain any changes of patterns in our results.It is also important not to change apparatus or equipment and to keep the experiment exactly the same.If this is kept to then my ex periment will be fair, hopefully giving me the most accurate results as possible.Safe Test:Keeping a safe test is also very important for the safety of me and other people around me. To ensure that my experiment is safe, I will carry out the following precautions.* Goggles should be warn to protect my eyes from acid or in case another accident occurred* I should act in a sensible and safe manner, carefully working with the equipment and being aware of any dangers.* The low concentration of acid I will use is a safety precaution to ensure that the acid is not dangerous.Obtaining My EvidenceTo obtain my evidence, I began by setting up my equipment and following the plan previously written. I measured hydrochloric acid (HCl) with water to produce the 50ml volume of the desired concentration, and added to this, 5g of small marble chips. I timed, in seconds, how long this took to produce a 45ml3 of gas by bubbling it through a delivery tube into an upturned mea-suring cylinder of water. The volume of which was 45ml. (All this is explained in more detailed in my plan). I included certain apparatus for accuracy. The reaction was timed accurately by using a stop clock measuring to 100th of a second. The scales measured the marble accurately by measuring exact to 0.01g. This accuracy of this was also improved by using small marble chips with more similar surface areas. The measuring cylinders used all measured to 0.1ml.From carrying out this process, I produced a set of results for 5 concentrations of acid, 2M, 1.6M, 1.2M, 0.8M and 0.4M. I then repeated these results for even more accuracy so that I will be able to produce an average.Results:The results for both the first set of experiments and the repeated, second set of experiments have been combined into one table. The column of Concentration, is measured in Molars (M). This is the volume of hydrochloric acid (HCl) and water (both measured in cm3) shown together. Time 1 and Time 2 are the times (in seconds) for expe riment 1, and the repeats, experiment 2.Other information that I also took, was a note of the room temperature at the time of taking the results. The results of experiment 1 and experiment two were taken on different days and so this was important information. I already know that temperature is an altering factor in rate of reaction and so if the temperature if not the same then it is important to know so that a change in results can be explained.Experiment 1 temperature 200CExperiment 2 temperature 190CThe first lots of experiments were taken at a temperature 10C higher than the second lot of experiments. This needs to be known to explain any patterns that may be related.Table of My Results:HCl (cm3)Water (cm3)Concentration (Molar)Time 1 (seconds)Time 2 (seconds)500213.0113.0740101.617.2713.3030201.227.3022.5120300.844.3732.4910400.4215.12186.22Analysing My Evidence and Drawing ConclusionsFrom my table of results, I can calculate additional information. I can work out an average ti me by adding the two existing times and dividing them by two. I can then find a rate of each reaction by dividing 1 by the average time. This will give me another pattern to follow by showing me how fast the reaction went at the different concentrations. The formulas for these are:Average = time + time / 2Reaction = 1 / timeI am going to add the answers of these as additional columns onto my table.HCl (cm3)Water (cm3)Concentration (Molar)Time 1 (seconds)Time 2 (seconds)Average Time (seconds)Rate500213.0113.0713.040.76740101.617.2713.3015.290.06530201.227.3022.5125.310.0420300.844.3732.4938.430.02610400.4215.12186.22200.670.005From the table, without the average time, we can see a common difference between the time in experiment one and the time in experiment two. All results for experiment 1 are slightly quicker than the times for experiment two (with exception of the 2M experiment). We can relate this back to the temperature difference. Temperature affects the rate of reaction. Whe n particles are heated up, they have more energy. They move around more quickly. As they travel faster, there are more collisions in a certain time. As well as this, with more energy, more collisions are likely to result in a reaction. Therefore, as temperatures are raised, reactions get faster and more likely, increasing the rate of reaction.I noted when obtaining my results how the room temperature at the time experiment 1 was being carried out was 200C, where as experiment 2 was at 190C. This means that experiment 1, having the higher temperature, would have shown a faster rate of reaction, which is exactly what is shown in the table.This is apart from the reading for the highest concentration, the 2M experiment. Here we see that the time in experiment 2 is faster than that in experiemnt1. However, this is by 0.06 of a second. Here human reaction time may be a factor. Although the stop clocks are very accurate, they will never be exact, as it is very hard to stop the clock exactl y at the time you want it to. This error may have led to this small difference. By noticing this here, we can also take it into account for the other experiments, remembering that they are not exact but only by a very small error.The average helps to even out the differing results which means that one, middle number is produced to work with. Because, also, I have no obvious anomalous results, readings that dont fit the pattern of the higher the concentration, the faster the reaction and so the shorter the time, the averages will follow the same trend.To look more closely at my data, I am going to enter my average times onto a line graph. I think this is the best type of graph to use as it fits my results of continuous date and will show any trends clearly. This is on the next page (graph 1). The concentration in molars is along the x-axis, the time of the reaction in seconds is along the y-axis. I have plotted my recorded points and drawn a curved line of best fit.From this data I c an now say that the concentration does effect the rate of reaction. The line of best fit shows very clearly, a definite trend that as you increase the concentration, you decrease the time taken, showing an increase in speed. Rate and time are inversely related. As one increases the other decreases, as seen on the graph, meaning that as time increases, rate of reaction decreases.What we see on the graph is a sharp decrease from about 200 seconds to about 50 seconds over a concentration range of only 0.3M showing fast reactions. Over another 11M there is a much more gradual decrease as it slows down, only covering approximately a range of 49 seconds. The remaining range of 2M covers 1 second and appears to be reaching a level line.The second graph (graph 2 over the page), again a line graph, is using the rate I worked out in the table, against the concentration. This gives us I more direct trend towards the effect of concentration on rate of reaction. It shows very definitely and clea rly that the higher the concentration, the higher the rate. As rate and time are inverse, I would expect an almost mirror of the concentration against time graph. This is what has happened. Instead of a sharp decrease followed by a gradual decrease as seen in the concentration against time graph, the concentration against rate graph shows a gradual increase followed by a sharp increase. My line of best fit covers 1.4M at a 0.05 rate very gradually, then a slight increase, and then over 1M, the rate increases by 0.567.My prediction before carrying out this experiment was that the higher the concentration of acid, the faster the rate of reaction. Both these graphs prove this to be correct. This is due to the activity of the molecules in the experiment. The rate of reaction is the amount of a substance that takes part in a chemical reaction in a given time. In order to react, the particles must collide with each other. If the rate of reaction is increasing, it is the amount of particle s colliding and therefore reacting that is increasing. As we increase the concentration of acid, the substance taking part in the chemical reaction (along with marble chips), the rate of reaction increases. This is because an increase in concentration increases the amount of collisions taking place. With more particles in the same volume, there is a greater and more common likely hood of collisions taking place. This is why concentration effects rate of reaction.The second part of my prediction was more detailed. I predicted that the level of concentration may also have a direct effect on the rate of reaction, meaning that if the reaction of a 2M acid was compared with that of a 1M acid, which is half the concentration, the rate of reaction will also be half.I looked at my graph of concentration against rate to investigate this. I used the examples of 1M and 2M and took the following readings of my graph and line of best fit.1M = rate of 0.032M = rate of 0.72This shows my prediction to be very incorrect. If it would be true, then my graph would show a straight line of equal increase. However, my line of best fit gradually increases, going against my prediction.From my results I can conclude that the rate of reaction between marble chips and acid is increased by an increase in concentration.EvaluationLooking back on the experiment, I think that I have carried out successful, dependable procedure that has given me precise and reliable evidence and results. First I will look at the practical work that I did. When doing the practical work, I followed my plan accurately. I kept it a safe and fair test and this is important. I experiment I planned was easy to carry out. Problems arose in temperature. The only variable was meant to be concentration, but due to uncontrollable circumstances, room temperature did alter. Luckily this occurred between sets of experiments which gave me additional information to look into. However, if that had happen part way through a set of results my results may have been slightly more irregular. To overcome this problem, results could have been taken all in one go. However, this was not practical in the spaces of time we were able to have. The other variable of surface area appeared to de successful. We already took precautions over this by using small marble chips instead of large, and so no problems arose.The accuracy of my results is as accurate as I think I would need. From my results I have produced graphs that show very definite and visible trends and patterns and no anomalous results and so the readings must have been correct. It may be possible to improve accuracy. I learnt from the strongest concentration, the 2M acid and the fastest reaction, that for short spaces of time the accuracy is not as exact. This could be solved by an alteration in equipment. If I were to do the experiment again, I would use a larger upturned measuring cylinder. The one I used held 45ml3 of solution. I found this took roughly 1 3 seconds to fill with gas, making it slightly inaccurate because it was a small space of time. However, if we increase the volume of the cylinder, it would take a longer time period. This may have improved accuracy. Other equipment all proved fine. I had no troubles with any other pieces of apparatus and would not alter them.To look into this investigation further of how concentration alters rate of reaction, I would like to look into concentration of solids in a reaction and concentrations of gases, similar to how we look at concentration of liquid and acid. It will be interesting to see if gases for instance have the same reaction patterns as liquids. I can see that my results mean that an increase of concentration of acid increases the rate. Would an increase of concentration of gas make any difference in the rate of reaction? This would help to add to an overall conclusion to the investigation.