The activities of solids and liquids are takes as unity and at low concentrations, the activity of a solute is approximated to its molarity.
Th cell reaction will be
\(Pt_{(s)} | H_{2(g)}, 1\,bar | H^+_{(aq)} 1\,M | AgCl_{(aq)} 1\,M | Ag_{(s)}\)
$Zn | Zn ^{2+}(0.1\, M ) \| Ag ^{+}(0.01 \,M )| Ag$
[આપેલ $: E_{Z n^{+2}/Z_{n}}^{0}=-0.76 \,V ; E _{A g^{+} / A_{ g }}^{0}=+0.80 \,V ; \frac{2.303 RT }{ F }=0.059$]
$[Fe(CN)_6]^{4-} \rightarrow [Fe(CN)_6]^{3-} + e^{-1}\, ;$ $ E^o = -0.35\, V$
$Fe^{2+} \rightarrow Fe^{3+} + e^{-1}\ ;$ $E^o = -0.77\, V$
$Pt|{H_2}_{\left( {1{\mkern 1mu} atm} \right)}|0.1{\mkern 1mu} M{\mkern 1mu} HCl||{\mkern 1mu} {\mkern 1mu} 0.1{\mkern 1mu} M\,C{H_3}COOH|{H_2}_{\left( {1{\mkern 1mu} atm} \right)}|Pt$
$(i)$ $PtCl _{4} . 5 NH _{3}$
$(ii)$ $PtCl _{4} . 4 NH _{3}$
$(iii)$ $PtCl _{4} . 3 NH _{3}$
$(iv)$ $PtCl _{4}. 2 NH _{3}$
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