$Pt | H_2\,(g) | H^{+}_{(aq)} (10^{-8}\, M) | | H^{+}_{(aq)} (0.001\,M) | H_2\,(g) | Pt$
\(E_{cell} = \,\,0.0591\,\,\log \,\,\frac{{{C_2}}}{{{C_1}}}\)
\( = \,\,0.0591\,\,\log \,\,\frac{{{{10}^{ - 3}}}}{{{{10}^{ - 8}}}}\,\, = \,\,0.0591\,\,\log \,\,{10^5}\)
\( = \,\,0.0591\,\, \times \,5\, = \,\,0.2955\,volt\)
$Zn = Z{n^{2 + }} + 2{e^ - };\,\,{E^o} = + 0.76\,V$
$Fe = F{e^{2 + }} + 2{e^ - };\,\,{E^o} = + 0.41\,V$
નીચેના કોષ પ્રક્રિયા માટે $EMF$ ......... $\mathrm{V}$ છે
$F{e^{2 + }} + Zn\, \to \,Z{n^{2 + }} + Fe$