An experiment to measure the amount of oxygen bubbles given off in different strengths of sodium hydrogen carbonate Essay Example

An experiment to measure the amount of oxygen bubbles given off in different strengths of sodium hydrogen carbonate Essay Example An experiment to measure the amount of oxygen bubbles given off in different strengths of sodium hydrogen carbonate Essay An experiment to measure the amount of oxygen bubbles given off in different strengths of sodium hydrogen carbonate Essay Equipment list* Lamp* Beaker* Boiling tube* Pond weed* Ruler* scissors* Water* Measuring cylinder* Different strengths of NaHCO3* Paper clip* Stop clockPlanIn the experiment I will get a piece of pond weed and cut it to 5cm I will then make sure that the hole is clear and the leaves from that end have been removed so that oxygen bubbles will be able to escape and not get trapped. Once I have done this I will attach a paper clip to the other end to keep the piece of weed in water or the solution. I will then get a beaker and put 200ml of water and into it. After this I would place the boiling tube with 40ml of water and the pond weed into it and turn on the lamp that will be put 20cm away from the beaker and leave for 3minutes so that the weed can get used to the water.Once these 3 minutes are over I will be taking readings on how many bubbles come out of the weed every 30 seconds and I will be taking ten readings. After I have took all these reading I will do the same again. But inst ead of the piece of pond weed being in water in will now be in 0.25% NaHCO3 and I will do the same leave it for 3 minutes so that the weed can get used to the solution and then I will start taking readings. I will take ten readings one every 30 seconds this will take me up to 5 minutes. After this I will do the same for 0.5%, 0.75% and 1.0% of NaHCO3 during all these experiments I will be using the same piece of pond weed.DiagramPredictionI predict that the more concentration of NaHCO3 I use then the faster the rate of oxygen bubbles that will be given off.Fair TestingIn the experiment I want it to be a fair test so that I can get accurate results so I will be using a measuring cylinder so that I will get the same amount of solution each time. I will be using the same amount of pond weed, as the experiments will run over a number of lessons. I will also want it to be the same temperature so that that will not be able to cause any differences. I will also want the same light intensit y that is why I will be using a ruler to measure the 20cm gapping each time. I will also be leaving it for the same amount of time so that it will all be fair.ResultsA table to show the results from our experimentExperiment one0sec30 sec60 sec90 sec120 sec150 secwater0000110.25%0011220.5%033671011341700.75%0231014170.1%01325293339180 sec210 sec240 sec270 sec300 secAveragewater1133310.25%3345520.5%2032382743073401700.75%1825273343171.0%465156616838Experiment two0sec30 sec60 sec90 sec120 sec150 secwater0234890.25%0681213160.5%002041671080.75%0951802873955031.0%013456180 sec210 sec240 sec270 sec300 secAveragewater111415151590.25%2025313643190.5%2252843403894461750.75%60270781993210405051.0%991112127ConclusionI have come to the conclusion that the higher the concentration of NaHCO3 I use then the faster the rate of oxygen bubbles that will be given off. This is what I said in my prediction.This pattern does not happen when I have had to change my piece of pond weed as the practical ran over a couple of lessons.Looking at my results they back up my prediction as the graph shows the more concentration I use the more oxygen bubbles given off and I am right saying that when I start the experiment in a new lesson the number of bubbles that are given off is less.EvaluationLooking back my method and my results they are pretty accurate. My results are good and I would be happy to use my results to say that the higher the amount of NaHCO3 I use then the faster the rate of oxygen bubbles that will be given off. I can also come to a clear conclusion that when I have had to start with a new piece of pond weed the number of oxygen bubbles has dropped. In my method I could write about why I think that there will be any anomalous results if any.To see if this works in dark we could cut out the lamp so we could do the experiment in dark but it would have to be the same density of darkness otherwise it wouldnt be a fair test.

Critical Essay Writing

Critical Essay Writing Critical Essay Writing In modern education, critical thinking is important assignment. The aim of all educators is to teach their student how to think critically. The critical thinking is an important skill and it is developed with the help of critical essay writing. Critical thinking is about valuation of what people say or what the author describes in his or her work. The purpose of teaching critical thinking is to improve the thinking skills of students and, thus, to prepare them better to writing a critical essay: Critical Essay Writing: How to Write You should show you ability to synthesize criticism with your own analysis which should be well-organized and well supported in your critical essay. You should think about thesis statement that controls and unifies the development of supporting evidence. Thesis sentence should help the reader to understand the sequence of your ideas along with the textual evidence supporting your thesis. As in any research essay, you should pay attention to organization of your notes. Select a topic that is of interest to you, the topic which you would like to research. Reading the original text, try to understand the problems that author is trying to solve. Find the important words in the book and determine the author's usage of these terms. Identify the most important sentences in the book, the ones that express the judgments. These are the foundational affirmations and denials of the author. They must be either premises or conclusions. State them in your own words. While writing English essay construct the arguments, begin with assumptions and self-evident propositions. An argument is your line of reasoning aimed at demonstrating the truth or falsehood of the author's work. You should present reasons, statements, and facts that support your point of view in the essay. Determine the author's solutions to the problem or question that he or she posed. After these steps are completed, you may start research on criticisms related to your topic. At this stage of essay writing process, you have a chance to argue with the author and express yourself. However, do not say that you agree or disagree with the author until you do not understand why your opinion is different. Do not start criticizing if you are not able to say that you really understand the book. Critical literary essay require a good critical judgments. Critical Essay Outline Critical essay outline should be well constructed. Critical essay outline has a definite format: introduction, body paragraph and conclusion. Before writing an essay make a plan, think about thesis statement, ideas, arguments and examples. Academic essay writing demands from you the expression of your ideas, not copy/paste of others. Ordering custom critical essay writing service at you get 100% plagiarism free essay written in accordance to your instructions. We do not miss deadlines and we put your interests and needs on the first place. We guarantee authenticity of every essay we deliver and provide free plagiarism report. Read also: College Essay Essay Writing Thesis Writing Tips Thesis Topics Thesis Papers in Education