$\frac{{{\text{Equivalent}}{\mkern 1mu} {\text{weight}}{\mkern 1mu} {\text{of}}{\mkern 1mu} Cu}}{{{\text{Equivalent}}{\mkern 1mu} {\text{weight}}{\mkern 1mu} {\text{of}}{\mkern 1mu} Ag}} = $ $\frac{{{\text{Weight}}{\mkern 1mu} {\text{of}}{\mkern 1mu} Cu\,\,{\text{deposited}}{\mkern 1mu} }}{{{\text{Weight}}{\mkern 1mu} {\text{of}}{\mkern 1mu} A{\text{g}}{\mkern 1mu} \,{\text{deposited}}}}$
Weight of copper deposited $ = \frac{{10.8 \times 32}}{{108}} = 3.2\,gm$
$Fe_{(aq)}^{3 + } + {e^ - } \to Fe_{(aq)}^{2 + }$ ; ${E^o} = 0.771{\mkern 1mu} \,volts;{\mkern 1mu} $
${\mkern 1mu} {I_{2(g)}} + 2{e^ - } \to 2I_{(aq)}^ - \,;{\mkern 1mu} $ ${E^o} = 0.536{\mkern 1mu} \,volts$
કોષ પક્રિયા $2Fe^{3+}_{(aq)} + 2l^{-}_{(aq)} \rightarrow 2Fe^{2+}_{(aq)} + I_{2(g)}$ માટે $E^o_{cell} = ….$
${[Fe\,{(CN)_6}]^{4 - }}\, \to \,{[Fe{(CN)_6}]^{3 - }}\, + \,{e^ - }\,;\,$ ${E^o}\, = \, - \,0.35\,V$
$\,F{e^{2 + }}\, \to \,F{e^{3 + }}\, + \,{e^ - }\,;$ ${E^o}\, = \, - \,0.77\,V$
(આપેલ: $ E^oCr^{+3}| Cr = -0.75 \,V$ $E^o Fe^{+2} | Fe = - 0.45\, V)$