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A solution of KMnO_(4) on reduction yields either a colourless solution or a brown precipitate or a green solution depending on pH of the solution. What different stages of the reduction do these represent and how are they carried out? |
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Answer» Solution :OXIDISING behaviour of `KMnO_(4)` depends on pH of the solution. In acidic medium `(pH lt 7)`. `MnO_(4)^(-) + 8H^(+) + 5e^(-) rarr underset(("Colourless"))(MN^(2+)) + 4H_(2)O` In alkaline medium `(pH gt 7)`, `MnO_(4)^(-) + E^(-) rarr underset(("Green"))(MnO_(4)^(2-))` |
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