$Zn | Zn ^{2+}(0.1\, M ) \| Ag ^{+}(0.01 \,M )| Ag$
[આપેલ $: E_{Z n^{+2}/Z_{n}}^{0}=-0.76 \,V ; E _{A g^{+} / A_{ g }}^{0}=+0.80 \,V ; \frac{2.303 RT }{ F }=0.059$]
$2 Ag ^{+}_{( aq. )}+2 e ^{-} \rightarrow 2 Ag _{( s )}$
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$Zn _{( s )}+2 Ag ^{+}_{( aq. )} \rightarrow Zn _{( aq .)}^{2+}+ 2 Ag _{( s )}$
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$E _{ cell }^{0}= E _{ Ag ^{+} / Ag }^{0}- E _{ zn ^{2+} / Zn }^{0}$
$=0.80-(-0.76)$
$=1.56 \,V$
$E _{\text {cell }}=1.56 \frac{-0.059}{2} \log \frac{\left[ Zn ^{2+}\right]}{\left[ Ag ^{+}\right]^{2}}$
$=1.56-\frac{0.059}{2} \log \frac{0.1}{(0.01)^{2}}$
$=1.56-\frac{0.059}{2} \times 3$
$=1.56-0.0885$
$=1.4715$
$=147.15 \times 10^{-2}$
${Cu}({s})\left|{Cu}^{2+}({aq})(0.01 {M}) \| {Ag}^{+}({aq})(0.001 {M})\right| {Ag}({s})$ કોષ માટે ,કોષનો પોટેન્શિયલ $=.....\times 10^{-2} {~V}$
[ઉપયોગ : $\frac{2.303 {RT}}{{F}}=0.059$ ]
$Pt/ M/M^{3+}(0.001 \,mol\, L^{ -1})/Ag^+(0.01\, mol\, L^{-1})/Ag$
$298\, K$ પર સેલનો $emf$ $0.421\, volt$ હોવાનું જાણવા મળ્યું છે. $298\, K$ પર અર્ધ પ્રક્રિયા $M^{3+} + 3e \to M$ નો પ્રમાણિત પોટેન્શિયલ ......... $\mathrm{volt}$ હશે .
(આપેલ છે: $298\, K$ પર $E_{A{g^ + }/Ag}^o \,=\, 0.80\, Volt$ )
આપેલ :
$F{e^{2 + }} + 2{e^ - } \to Fe;$ ${E^o}_{F{e^{2 + }}/Fe} = - 0.47\,V$
$F{e^{3 + }} + {e^ - } \to F{e^{2 + }};$ ${E^o}_{F{e^{3 + }}/F{e^{2 + }}} = + 0.77\,V$
$Zn^{+2}_{(aq)} + 2e \rightleftharpoons Zn(s), -0.76\,\, volt$ ;
$Ce^{+3}_{(aq)} + 3e \rightleftharpoons Cr(s), -0.74 \,\,volt.$
$2H^{+2}_{(aq)} + 2e \rightleftharpoons H_2(g), + 0.0\,volt$ ;
$Fe^{+3}_{(aq)} + e \rightleftharpoons Fe^{+2}_{(aq)}, + 0.77 \,\,volt$
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