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InterviewSolution
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How many mole of `FeSO_(4),H_(2)C_(2)O_(4)` and `FeC_(2)O_(4)` are oxidised separately by one mole of `KMnO_(4)` in acid medium? |
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Answer» `FeSO_(4)` : `Fe^(2+) rarr Fe^(3+) + e` `Mn^(7+) + 5e rarr Mn^(2+)` Thus, `5Fe^(2+) + Mn^(7+) rarr Fe^(3+) + Mn^(2+)` or `5` mole of `FeSO_(4)` are oxidised by `1` mole `KMnO_(4)`. `H_(2)C_(2)O_(4)`: `C_(2)^(3+) rarr 2C^(4+) + 2e` `Mn^(7) + 5e rarr Mn^(2+)` `5C_(2)^(3+) +2Mn^(7+) rarr 10C^(4+) + 2Mn^(2+)` or `5//2` mole of `H_(2)C_(2)O_(4)` are oxidised by `1` mole `KMnO_(4)`. `FeC_(2)O_(4)`: `Fe^(2+) +C_(2)^(3+) rarr Fe^(3+) + 2C^(4+) + 3e` `Mn^(7+) + 5e rarr Mn^(2+)` `5FeC_(2)O_(4) +3Mn^(5+) rarr 5Fe^(5+) rarr 5Fe^(3+) + 10C^(4+) + 3Mn^(2+)` or `5//3` mole of `FeC_(2)O_(4)` are oxidised by `1` mole `KMnO_(4)`. |
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