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If fE1^circ, fE3^circ and fE3^circ are t...

If `fE_1^circ, fE_3^circ` and `fE_3^circ` are the standard electrode. poteritials for `Fe / Fe^2+, Fe^2 * / Fe^3+` and `Fe / Fe^3+` electrodes_respectively, derive a relation hetween `fE_1^circ, fE_2^circ` and `bE^circ boldsymbolx^*`

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