Catalytic decomposition of hydrogen peroxide, 2 of 2. A 3% hydrogen peroxide solution (H2O2) undergoes a very slow decomposition under normal conditions. The rate of decomposition is greatly increased by addition of powdered potassium iodide (KI) which acts as a catalyst. The decomposition of hydrogen peroxide occurs in two steps: H2O2 (aq) + I- (aq) -> H2O(l) + OI-(aq) and H2O2(aq) + OI-(aq) -> H2O(l) + O2(g) + I-(aq). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
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