# A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The anode of the cell might be

$\begin{array}{1 1}Cr\\Fe\\Pt\\\text{diamond}\end{array}$

The anodic half-cell will be $Pt|Fe^{3+},Fe^{2+}$.Hence,Pt is anode.
answered Jul 21, 2014