Coordination CompoundMedium

Question

MnO₄^2- (1 mole) in netural aqueous medium disproportionates to

Options

A.2/3 mole of MnO₄^- and 1/3 mole of MnO₂

B.1/3 mole of MnO₄^- and 1/3 mole of MnO₂

C.1/3 mole of Mn₂O₇ and 1/3 mole of MnO₂

D.2/3 mole of Mn₂O₇ and 1/3 mole of MnO₂

Solution

3MnO₄^2- + 2H₂O → MnO₂ + 2MnO₄^- + 4OH^-
or 3MnO₄^- + H₂O → MnO₂ + MnO₄^- + OH^-

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