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Rate of reaction for liver and hydrogen peroxide

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Introduction

Preliminary Rate of reaction for liver and hydrogen peroxide Aim: My aim is to investigate how temperature will affect the rate of reaction between an amount of liver and hydrogen peroxide. Also I should be aware of other variables such as time, mount of liver and amount of the chemical. Hypothesis and Background research: The catalyse in this experiment is a very effective catalyse. One of this catalyse can decompose 40,000 molecules of hydrogen peroxide in a second. However, unlike chemical catalysts, which work under a wide range of conditions, enzymes are only able to work under limited conditions. Enzymes work best at body temperature once temperatures increase past this temperature the enzymes start to denature and fail to work efficiently. There are ways to alter particle contact and therefore the reaction rate. ...read more.

Middle

The amount of time that the liver and hydrogen peroxide is left to react. Method: We gathered our equipment and set it up accordingly. We then measured five grams of liver and twenty millilitres of hydrogen peroxide several times and set them up aside in separate beakers. We filled a measuring cylinder (100ml)full with water and stood in place upside-down using a clamp and stand. We connected the tube in side the upside-down beaker that leads to a bung. Then we heated the hydrogen peroxide to the temperature we were testing. We had to do the test five times not including repeats. The we put the liver and the heated hydrogen peroxide in the bung together and waited for one minute for a full reaction. The we recorded the amount of water missing from the beaker i.e. ...read more.

Conclusion

The 100% concentration produced the most o2 in the shortest time, which gives it a higher reaction rate than the others. My prediction for the first experiment was the same as the second one and for this experiment I was correct. Because in the results the first two leads up to the highest reading which is the 3rd then it lowers, this shows that the enzymes are denaturing by the collision theory. My results were pleasing for the second method. The results in this test were very accurate and precise. The original results and the repeats were near enough the same. To make the test fair I didn't round up the temperatures but I got them as close to the targeted temperature. Because in these two tests the results were pleasing for they did follow the collision theory rule, I will use the same measurements for my write up. ...read more.

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