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Balance the following equation by oxidat...

Balance the following equation by oxidation number method.
`KMnO_(4)+H_(2)SO_(4)+H_(2)C_(2)O_(4)toK_(2)SO_(4)+MnSO_(4)+CO_(2)+H_(2)O`

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(i)` 2KMnO_(4) + 3H_(2)SO_(4) + 5H_(2)O_(2) to K_(2)SO_(4) + 2MnSO_(4) + 8H_(2)O + 5O_(2)`
(ii) `2KMnO_(4) + 10KCl + 8H_(2)SO_(4) to 2MnSO_(4) + 6K_(2)SO_(4) + 8H_(2)O + 5Cl_(2)`
(iii) `3H_(2)O_(2) + 2MnO_(2) + 2OH^(-) to 2MnO_(4)^(-) + 4H_(2)O`
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