8 What is the half cell reaction of pt(s) | Hg(l) | Hg2Cl2(s) | Cl-(aq).

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25^{o} C .

C d^{2 +} (a q, 1 M) ∣ C d (s); E_{C d^{2 +} / C d}^{0} = - 0.40 V

H g_{2} C l_{2} (s) ∣ H g (l) ∣ C l^{-} (a q, 0.1 M); E_{C l^{-} / H g_{2} C l_{2} / H g}^{0} = 0.28 V

25^{\circ} C

P t (s) | B r^{-} (a q) | B r_{2} (g) | | C l_{2} (g) | C l^{-} (a q) | P t (s)

^{o}

P t (s) | H_{2} (1 a t m) | H^{+} (? M) | | C l^{-} (1 M) | H g_{2} C l_{2} (s) | H g (l)

E_{C l^{-} / H g_{2} C l_{2} / H g} = 0.28 V

25^{o} C

P t | {B r}_{2} (g) | {B r}^{-} (a q) | | {C l}^{-} (a q) | {C l}_{2} (g) | P t

E_{r e d}^{o}

H g_{2} C l_{2} (s) + 2 e^{-} \to 2 H g (s) + 2 C l^{-} (a q)

0.27 V

p K_{s p}

H g_{2} C l_{2} (s)

E_{r e d}^{\circ}

H g_{2}^{2 +} (a q) + 2 e \to 2 H g (s) .

\frac{2.303 R T}{F} = 0.06)

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