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manganese oxide

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manganese(IV) oxide

Brown solid that acts as a depolarizer in dry batteries by oxidizing the hydrogen gas produced to water; without this process, the performance of the battery is impaired.

It acts as a catalyst in decomposing hydrogen peroxide to obtain oxygen:

2H2O2 (aq) → 2H2O (l) + O2 (g)

It oxidizes concentrated hydrochloric acid to produce chlorine:.

MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O



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