A 5% aqueous solution of hydrogen peroxide ( OTC hydrogen peroxide)decomposes sl

Question

A 5% aqueous solution of hydrogen peroxide ( OTC hydrogen peroxide)decomposes slowly, but hydrogen peroxide dropped onto a fresh sliceof an apple evolves foam rapidly. Give a logical explanation of theaction of fresh apple on hydrogen peroxide. Write the equation forthe decomposition of hydrogen peroxide.

Explanation / Answer

2H2O2 (l) --> O2 (g) +2H2O (g) The apple cells have catalase enzymes which reduce the activationenergy necessary for the decomposition of hydrogen peroxide. As aresult, it occurs at a faster rate. The foam seen is the water thatis produced by the reaction.

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