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If a piece of Potassium is dropped into a beaker of water it whizzes around on the surface of the water. The reaction is so vigorous that the heat of it causes the Potassium metal to metal. It 'fizzes' and the heat generated can often cause the Hydrogen, that is produced by the reaction, to ignite with a lilac colour flame. Larger pieces of Potassium may even explode due to the vigor of the reaction.

2K + 2H2O ----> 2KOH + H2 (gas)

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14y ago

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