\(\frac{{{{\text{W}}_{\text{1}}}}}{{{{\text{E}}_{\text{1}}}}}\,\, = \,\,\frac{{{W_2}}}{{{E_2}}}\,\,\,\, \Rightarrow \,\,\,\frac{{{W_{{H_2}}}}}{{{E_{Mg}}}}\,\, = \,\,\frac{{{E_{{H_2}}}}}{{{E_{Mg}}}}\,\, = \,\,\frac{1}{{12}}\)
(આપેલ છે: $\mathrm{E}_{\mathrm{Sn}^{2+} / \mathrm{Sn}}^{0}=-0.14 \mathrm{\;V}$ $\left.\mathrm{E}_{\mathrm{Pb}^{+2}/{\mathrm{Pb}}}^{0}=-0.13 \;\mathrm{V}, \frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.06\right)$
[આપેલ, $KCl$ નું મોલર દળ $74.5 \,g\, mol ^{-1}$ છે.]