\({E_{Zn/Z{n^{ + 2}}}} = \,\,E_{Zn/Z{n^{ + 2}}}^ \circ \, - \,\,\frac{{0.059}}{2}\log \,\frac{{[Z{n^{ + 2}}]}}{{10}}\) ......... \((2)\)
\({E_{Zn/Z{n^{ + 2}}}}\, = \,\,{E_{Zn/Z{n^{ + 2}}}}\, + \,\,\frac{{0.059}}{2}\)
(નજીકનાં પૂર્ણાંકમાં રાઉન્ડ ઑફ). $\left[\right.$ આપેલ $, E_{C u^{2+} / C u}^{o}=0.34\, V , E _{ NO _{3}^{-} / NO_2 }^{\circ}=0.96\, V$ $,E _{ NO _{3} / NO _{2}}^{\circ}=0.79 \,V$ $\left.\frac{ RT }{ F }(2.303)=0.059\right]$