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What volume of 0.1M H(2)O(2) solution wi...

What volume of 0.1M `H_(2)O_(2)` solution will be required to completely reduce 1 litre of 0.1 M `KMnO_(4)` in acidic medium?

Text Solution

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The correct Answer is:
5
2 L of 0.5 M `KMnO_4` solution will contain `2 xx 0.5 = 1.0` mol of `KMnO_4` . Reduction of `KMnO_4` is
`MnO_(4)^(-) + 8H^(+) + 5e^(-) to Mn^(2+) + 4 H_(2)O`
Thus , 1 mol of `MnO_(4)^(-)` requires 5 F of electricity .
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