The standard potentials of MnO4−|Mn2+ and MnO2|Mn2+ electrodes in acid solution are 1.51 and 1.23 V,

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The standard potentials of MnO4−|Mn2+ and MnO2|Mn2+ electrodes in acid solution are 1.51 and 1.23 V, respectively. Standard electrode potential for the electrode, MnO4−|MnO2 in acid solution is

Accepted Answer

$E_{MnO_{4}^{-}|MnO_{2}} = \frac{5 	imes E_{MnO_{4}^{-}|Mn^{2 +}} - 2 	imes E_{MnO_{2}|Mn^{2 +}}}{5 - 2}$$= \frac{5 	imes 1.51 - 2 	imes 1.23}{3} = 1.697	ext{ V}$

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