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canvas prints elephant canvas prints reaction canvas prints decomposition canvas prints reduction canvas prints catalyst canvas prints catalysis canvas prints hydrogen peroxide canvas prints water canvas prints oxygen canvas prints soap canvas prints liquid canvas prints colour canvas prints food colouring canvas prints orange canvas prints foam canvas prints

photographs elephant photos reaction photos decomposition photos reduction photos catalyst photos catalysis photos hydrogen peroxide photos water photos oxygen photos soap photos liquid photos colour photos food colouring photos orange photos foam photos

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Elephant's toothpaste. This is a demonstration of the rapid decomposition of hydrogen peroxide. A 30% solution of hydrogen peroxide is placed in a conical flask, along with some liquid soap (such as washing-up liquid) and some food colouring. When a catalyst such as potassium iodide is added, the hydrogen peroxide rapidly decomposes to water and oxygen. The oxygen is trapped as bubbles in the liquid soap and foams out of the flask. The reaction is exothermic, the foam can get very hot.

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