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How potassium permanganate is prepared from MnO_2. |
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Answer» SOLUTION : (a) PREPARATION of `KMnO_4`: Potassium permanganate is prepaered by the FUSION of `MnO_2`with an alkali metal hydroxidizing like `KNO_3` . It froms dark green `K_2 MnO_4` which disproportinates in a neutral of acidic solution to give peremanganate (i) `3MnO_2 + 4KOH + O_2 OVERSET ( KNO_3) to 2K_2 MnO_4 + 2H_2O` (ii) `3MnO_(4)^(2-) + 4H to 2MnO_4+ MnO_2 + 2H_2O` |
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