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What Happens When You Heat Potassium Permanganate?

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It decomposes making oxygen.
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I found this on the internet and I hope it helps: Potassium permanganate explodes violently when heated with concentrated sulphuric acid. However, when a solution of hydrogen peroxide is mixed with a solution of the permanganate and diluted sulphuric acid added, the two compounds decompose together, forming a nearly colourless solution, and oxygen is evolved.

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