hydrogen peroxide reaction with liver

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
HYDROGEN PEROXIDE AND LIVER.
CONTENTS PAGE;
Page 2: background information
Page 3: aim and method
Page 4: Independent Variable and dependent variable
Page 5: Hypothesis + pilot study + table of results
Page 6: Analysis + Evaluation
Page 7: reliability of evidence + reliability of conclusion
Page 8: other groups of results
Page 9: extension work

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Page 2

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
HYDROGEN PEROXIDE AND WATER
BACKGROUND INFORMATION
Enzyme found in most of plant and animal cells that functions as an oxidative catalyst. It decomposes
hydrogen peroxide into oxygen and water. Catalyst is a common enzyme found in almost all living
organisms which are exposed to oxygen found in the liver that catalyses the decomposition of
hydrogen peroxide to oxygen and water.
Catalysts are molecules which speed up the rates of chemical reactions without changing the end
product.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
If particle collide with less energy than the activation energy then there will be no reaction. The
particles will just bounce off each other. Look at the diagrams below.
At a higher concentration, there are more particles in the same amount of space. This means the
particles are more likely to collide and will be more likely to react. The diagrams below explain more
of it.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
At higher temperatures, there are going to be more collisions than at low temperatures because as
the temperature increases the reactant particles move faster and are more likely to collide with each
other.
Aim;
The aim of my investigation is to find out how long it would take 10ml3 of oxygen to be released in
the reaction occurring when hydrogen peroxide is at different concentrations(1%-4%) is added to
the liver of a lamb.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
The experiment was watched and timed with one person using the stop watch. The others
were taking observations and writing them down as the experiment was still running.
Apparatus setup;
The reason as to why we used this method was because it was a fair test and we could prevent
anything from interfering with the experiment and causing variables which can lead to an unfair
test.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
Hypothesis;
I believe the reaction rate and the production from hydrogen peroxide and liver solution would both
increase as the concentrations of hydrogen peroxide increased. As the amount of catalyse is
significant in the liver and the reaction would increase if the reactant was higher in the concentration.
Due to the reactants concentration increase I know that the gas production will be quicker than if
produced with a lower concentration.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
During the reaction I noticed that the hydrogen peroxide solution and the fizzing sound was
produced as well as bubbles showing a physical manifestation of gas produced my research showed
me that this gas was oxygen because of the formula;
Hydrogen peroxide + catalyse water +oxygen.
Analysis of the graphs;
From the results I have plotted on my graph I can see that my prediction was correct.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
Having an unbiased third party supervising and observing my test would ensure that the test was
safe, fair and reliable.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
Reliability of evidence.
My test is both reliable and accurate;
I repeated my test three times keeping my variables the same, the conditions are the same as
doing the tests in the same place. I worked alongside two others which made certain that more than
one perspective was observed and less chance of an error occurring.
The second attempt of my test when using 3% concentration of hydrogen peroxide had an outlier
result.…read more

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JOAN NSIMBI ADDITIONAL SCIENCE COURSE WORK
catalyse but the results are very similar. For the 3% concentration of hydrogen peroxide the results
turn out to be similar to the first concentration. The results have a large gap for the lamb's liver to the
cow's liver. 1st to 3rd results were ranging from 12 to 15 for the lamb's liver while the cow's liver was
between 19 ­ 21 which shows that more enzyme catalyse was produced in the third concentration.…read more

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