When i add KMnO4 into an unsaturated carboxylic acid the color of KMnO4 changes to brown and when i added few drops of H2SO4 into this brown solution the brown color disapears. how this occur kindly help me????

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When i add KMnO4 into an unsaturated carboxylic acid the color of KMnO4 changes to brown and when i added few drops of H2SO4 into this brown solution the brown color disapears. how this occur kindly help me????

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Answer 1 · 2016-01-12T22:57:01

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Explanation:

When you add the potassium permanganate to an unsaturated carboxylic acid in a neutral medium, the permanganate saturates the acid and is reduced to manganese dioxide $M n O_{2}$ $MnO_2$ which is a brown compound, insoluble in water.

When you add $H_{2} S O_{4}$ $H_2SO_4$ the dioxide decomposes into oxygen, water and manganese II sulfate

$2 M n O_{2} + 2 H_{2} S O_{4} \to 2 M n S O_{4} + O_{2} + 2 H_{2} O$ $2MnO_2 + 2H_2SO_4 rarr 2MnSO_4 + O_2 + 2H_2O$

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When i add KMnO4 into an unsaturated carboxylic acid the color of KMnO4 changes to brown and when i added few drops of H2SO4 into this brown solution the brown color disapears. how this occur kindly help me????

1 Answer

Explanation:

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