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When water reacts with potassium metal the hydrogen produced ignites explosively on the surface of water.What causes ignition?

When water reacts with potassium metal the hydrogen produced ignites explosively on the surface of water.What causes ignition?
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When water reacts with potassium metal the hydrogen produced ignites explosively on the surface of water.What causes ignition?

User Kmky
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Answer: Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite.

User WonderWorld
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Explanation: Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite.

User Szkj
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