Discuss the applications of electrochemical series.

The following reaction occurs in a cell $\mathrm{Zn}\left(\mathrm{s}\right)+{\mathrm{Co}}^{2+}\rightleftharpoons \mathrm{Co}\left(\mathrm{s}\right)+{\mathrm{Zn}}^{2+}$.

Write the electrode reaction and find out the e.m.f. cell, given

$\mathrm{Zn}\to {\mathrm{Zn}}^{2+}, {\mathrm{E}}^0=0.76 \mathrm{V}\mathrm{Co}\to {\mathrm{Co}}^{2+}, {\mathrm{E}}^0=0.28 \mathrm{V}$