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Write chemical equations for the followi...

Write chemical equations for the following reactions:
(a) Oxidation of nitrite ion by `MnO_4^(-)` in acidic medium,
(b) Acidification of potassium chromate solution.
(c ) Disproportionation of manganese (VI) in acidic solution.

Text Solution

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(a) `5NO_2^(-)+ 2MnO_4^(-) + 6H^(+) to 2Mn^(2+) + 3H_2O + 5NO_3^(-)`
(b) `2K_2CrO_4 + 2H^(+) to K_2Cr_2O_7 + 2K^(+) + H_2O`
(c ) `2MnO_4^(2-) + 4H^(+) to 2MnO_4^(-) + MnO_2 + 2H_2O`
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