$Pt(s)| H_2 (g,1\,bar)| HCl(aq)| AgCl(s)| Ag(s)| Pt(s)$
માટે કોષ પોટેન્શિયલ $0.92\, V$ છે. તો $(AgCl / Ag,Cl^- )$ ઇલેક્ટ્રોડનો પ્રમાણિત ઇલેક્ટ્રોડ પોટેન્શિયલ કેટલા ........... $\mathrm{V}$ હશે?
{ આપેલ $\frac{2.303RT}{F} = 0.06\,V \,\,298\,K $એ }
\(0.92\, = \,{E^o}\, - \,0.06\,\log \,\frac{{{{10}^{ - 6}}\,.\,{{10}^{ - 6}}}}{{{1^{1/2}}}}\)
\(0.92\, = \,{E^o}\, - \,0.06\,\log \,{10^{ - 12}}\)
\({E^o} + \,\,0.06\, \times \,12\)
\({E^o}\, = \,0.92\, - \,0.06\, \times \,12\)
\({E^o}\, = \,0.92\, - \,0.72\)
\(E_{Ag}^o\,/\,AgCl\, = \,0.20\)
$\mathrm{BrO}_{4}^{-} \stackrel{1.82 \mathrm{V}}{\longrightarrow} \mathrm{BrO}_{3}^{-} \stackrel{1.5 \mathrm{V}}{\longrightarrow} \mathrm{HBrO}$$\stackrel{1.0652 \mathrm{V}}{\longrightarrow} \mathrm{Br}_{2} \stackrel{1.595 \mathrm{V}}{\longrightarrow} \mathrm{Br}^{-}$
તો વિષમપ્રમાણ (disproportionation) અનુભવતો ઘટક ............
(આપેલ છે: $\mathrm{E}_{\mathrm{Sn}^{2+} / \mathrm{Sn}}^{0}=-0.14 \mathrm{\;V}$ $\left.\mathrm{E}_{\mathrm{Pb}^{+2}/{\mathrm{Pb}}}^{0}=-0.13 \;\mathrm{V}, \frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.06\right)$
$Zn(s) + C{u^{2 + }}(0.1\,M) \to Z{n^{2 + }}(1\,M) + Cu(s)$