31. Find the emf of the cell Zn(s)|Zn+2 (0.01M)|KCl saturated|Zn+2 (1.0M)|Zn (s).

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E M F

Z n | Z n^{2 +} (0.01 M) | | C u^{2 +}] (0.1 M) | C u

298 K

Z n | Z n^{2 +} (0.1 M) | | F e^{2 +} | F e (0.01 M)

0.2905 V

T = 298 K)

C u (s) | C u^{2 +} (1.0 M) | | A g^{+} (1.0 M) | A g (s) E_{c e l l}^{\circ} = 0.46 V

Z n (s) | Z n^{2 +} (1.0 M) | | C u^{2 +} (1.0 M) | C u (s) E_{c e l l}^{\circ} = 1.10 V

E_{c e l l}

Z n | Z n^{2 +} (0.1 M) | | A g^{+} (1.0 M | A g

298 K

$E^{0} Z n^{2 +} / Z n = - 0.76 V$ The EMF of the cell

$Z n / Z n^{2 +} (1 M) | | H C l (p H = 2) | H_{2 (1 a t m)}, P t$ is ::

Z n (s) | Z n^{2 +} (0.024 M) | | Z n^{2 +} (2.4 M) | Z n (s)

25^{0} C

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