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For the redox reaction $M n O_{4}^{-} + F e^{2 +} + H^{+} \to M n^{2 +} + F e^{3 +} + H_{2} O$ .
The correct coefficients of the reactants for the balanced equation are.

$M n O_{4}^{-}$ $F e^{2 +}$ $H^{+}$
(1) 5 1 4
(2) 2 5 4
(3) 1 5 8
(4) 2 5 8

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answer is C.

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Detailed Solution

$M n O_{4}^{-} + 5 F e^{2 +} + 8 H^{+} \to M n^{2 +} + 5 F e^{3 +} + 4 H_{2} O$

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