$M|{M^ + }||{X^ - }|X,$ ${E^o}({M^ + }/M)$ $= 0.44\, V$ અને ${E^o}(X/{X^ - })$ $= 0.33\,V$ છે.આ આંકડા પરથી શું તારણ કાઢી શકાય?
$RHS$: reduction $X + {e^ - } \to {X^ - }$ …..$(i)$
$LHS$: Oxidation $M \to {M^ + } + {e^ - }$ …..$(ii)$
Add $(i)$ and $(ii)$ $M + X \to {M^ + } + {X^ - }$
The cell potential = $ - 0.11\,V$
Since ${E_{cell}} = -ve$, the cell reaction derived above is not spontaneous. In fact, the reverse reaction will occur spontaneously.
$F{e^2}+ \left( {aq} \right) + A{g^ + }\left( {aq} \right) \to F{e^{3 + }}\left( {aq} \right) + Ag\left( s \right)$
$E_{Ag^+/Ag}^o = xV$, $E_{F{e^{2 + }}/Fe}^o = yV$, $E_{F{e^{3 + }}/Fe}^o = zV$
[આપેલ, $KCl$ નું મોલર દળ $74.5 \,g\, mol ^{-1}$ છે.]