To find how the rate of reaction Essay Example for Free

To find how the rate of reaction EssayResults analysis This invest of results appear, on the whole, to support my hypothesis. There is a general trend where the higher(prenominal) the concentration of the henry total heat peroxide, the high-speed more oxygen throttle is produced. More oxygen louse up would be expected to contrive been produced with the higher concentrations of hydrogen peroxide because as the concentrations go up, the more oxygen is produced and this is how the strength of the hydrogen peroxide is measured.For example, 1cmiof 1V hydrogen peroxide will produce 1cmi. So, if we take the 10cmi 2. 5V hydrogen peroxide used in my investigation, if it had been left to in full decompose, 25 cmi oxygen gas would have been made. Therefore the 2. 5V hydrogen peroxide used in my investigate had fully decomposed, and no more oxygen gas could have been produced, which explains why the amount of gas produced levelled aside at the end of the 5 minutes in which it w as being tested. The hydrogen peroxide of higher concentrations keep producing gas after the 5 minutes in which I was timing the decomposition of the hydrogen peroxide was up.I could not measure past 100cmi of oxygen gas, as my gas spray was not king-size enough. My hypothesis was that where there is a higher concentration of hydrogen peroxide, the rate of reaction is faster. We jakes attain from my table and graphs that on the whole my results support this hypothesis. Saying this, there are still ill-considered results. Having check out my 12. 5V hydrogen peroxide result twice, it was still a little slower rate of reaction than that of the 10V hydrogen peroxide (which I also checked twice).My results appeared to improve once I had checked them, although the results which I have plotted on my graph are averages of the two sets of results for each concentration of hydrogen peroxide. If there is an anomalous result, it will change the overall value of the averaged result, which can affect how accurately the results are shown. Other factors that can affect the results are -That the experiment will not be timed accurately and that readings are interpreted at the wrong time, which gives an inaccurate result for that time.-The gas syringe did not work properly, for example if the gas syringe was broken or if it stuck, an accurate reading would not be possible as the tweet would build up inside the gas syringe until it moved. This wouldnt give an accurate result as the gas syringe would not show a different value every ten seconds. -The dig up region of the liver used could also affect how well the experiment worked because if there were a greater surface area, there would be more area for the catalase to be in contact with the hydrogen peroxide, therefore more hydrogen peroxide would be exposed to the catalase in the liver.I would expect this to make the rate of reaction faster as there would be more catalyst readily available to speed up the reaction. -Th e size of liver used will affect the results, for example, if the size of one piece of liver was large than another piece of liver used with the same strength and amount of hydrogen peroxide, the hydrogen peroxide containing the larger piece of liver will have a faster rate of reaction as it will contain more catalase.-Any error in measurement throughout the experiments in my investigation will affect the results in this investigation, for instance if the hydrogen peroxide was measured incorrectly, different results will be represent which could possibly be anomalous. Most of these factors affecting my results are out of my control, much(prenominal) as whether the gas syringe is broken or the size and surface area of the liver (because it is almost impossible to weigh such a small piece of liver).The pieces of liver I used were only approximately the size of a grain of rice, although some were inevitable larger or smaller. Errors in my measurement, however, can be controlled and so I was very careful whilst measuring everything out and timing my experiments. Rebecca Allot 11Y Page 1 03/05/2007 Show laggard only The above preview is unformatted text This student written piece of work is one of legion(predicate) that can be found in our GCSE Patterns of Behaviour section.