Chemistry

Problem

What is the standard electrode potential for the electrode

\text{MnO}_4^-/\text{MnO}_2

in solution? Given:

E^\circ_{\text{MnO}_4^-/\text{Mn}^{2+}} = 1.51\text{V} \quad \text{and} \quad E^\circ_{\text{MnO}_2/\text{Mn}^{2+}} = 1.23\text{V}