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How is KMnO_(4) [Potassium permanganate] is prepared from MnO_(2)? Write equations. |
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Answer» Solution :Preparation of `KmNO_(4)` : Potassium permanaganate is pepared by the fusion of `MnO_(2) ` with an ALKALI METAL hydroxide and an oxidizing agent like `KNO_(3)` . It forms dark green `K_(2)MnO_(4)` which disproportionates in a NEUTRAL of acidic solution to give permanganate (i) `2MnO_(2)+4KOH+O_(2)overset("KNO_(3))to2K_(2)MnO_(4)+2H_(2)O` (ii) `3MnO_(4)^(2-)+4H^(+)to 2MnO_(4)^(-)+MnO_(2)+2H_(2)O` or `3K_(2)MnO_(4)+2H_(2)SO_(4)to underset"Potassium Permanganate"(2KMnO_(4))` |
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