Chemistry

Problem

Calculate the potential of an indicator electrode versus the standard hydrogen electrode, which originally contains 0.1M

\text{MnO}_4^-

and 0.8M

\text{H}^+

and which was treated with

\text{Fe}^{2+}

necessary to reduce 90% of

\text{MnO}_4^-

\text{Mn}^{2+}

E_{\text{MnO}_4^-/\text{Mn}^{2+}}^\circ = 1.51\text{V}