Chapter 17, Problem 64QAP

Consider a voltaic cell at 25°C in which the following reaction takes place:
${\text{MnO}}_2\left(s\right)+4{\text{H}}^{+}\left(aq\right)+2{\text{Br}}^{-}\left(aq\right)\to {\text{Br}}_2\left(l\right)+{\text{Mn}}^{2+}\left(aq\right)+2{\text{H}}_2\text{O}$
(a) Calculate E°.
(b) Write the Nernst equation for the cell.
(c) Find E under the following conditions: $\left[{\text{Mn}}^{2+}\right]=0.60M,\left[{\text{Br}}^{-}\right]=0.83M,\text{pH}=3.71$ .