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Does the Concentration of Hydrogen Peroxide Speed up the rate at which it is broken down by catalase
Member rating: No Rating | Words: | Submitted: Wed Aug 20 2003
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DOES THE CONCENTRATION OF HYDROGEN PEROXIDE SPEED UP THE RATE AT WHICH IT IS BROKEN DOWN BY CATALASE. AIM To find out whether the concentration of Hydrogen Peroxide affects the rate of decomposition of hydrogen peroxide when broken down by catalase. SCIENTIFIC KNOWLEDGE Hydrogen peroxide is a liquid bi-product of many chemical reactions in living things. It is toxic, so has to be broken down by the enzyme catalase which is also found in most living things. E.g. Hydrogen peroxide catalase water + oxygen 2H2O2 (aq) 2H2 O + O2 The enzyme catalase (peroxidase) was the first enzyme discovered and is one of the fastest enzymes, its turnover rate is about 40,000 molecules/second. It speeds up the decomposition of hydrogen peroxide. * Enzymes are not used up by the reaction and remain unchanged. * Enzymes work most efficiently at their optimum temperature and optimum pH, which from a previous experiment, I know to be about pH8 * Can be denatured...
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