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Experiment to Investigate a Factor which Affects the Rate of Decomposition of Hydrogen Peroxide by Catalase.
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| Submitted: Mon Oct 13 2003
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Phil Cooper L6 10.11.01. Experiment to Investigate a Factor which Affects the Rate of Decomposition of Hydrogen Peroxide by Catalase Aim The aim of this investigation is to investigate a factor which affects the rate of decomposition of hydrogen peroxide using the enzyme catalase. Background Catalase is present in nearly all the peroxisomes of nearly all aerobic cells, serving to protect the cell from the toxic effects of hydrogen peroxide by catalysing its decomposition into molecular oxygen and water. The overall reaction for this is: 2 H2O2 2 H20 + O2 The enzyme is among the most efficient known, with rates up 200,000 catalytic events/second. 'Hydrogen peroxide, H2O2, is a colourless, syrupy liquid that is a strong oxidising agent and, in water solution, a weak acid. It is miscible with cold water and is soluble in alcohol and ether. Although pure hydrogen peroxide is fairly stable, it decomposes into water and oxygen when heated above about 80°C; it...
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