The standard electrode potentials for the reactions Ag-aq- - e- Ags Sn2-aq- - 2e- Snsat 25oC are 0-80 volt and -0-14 volt respectively- The emf of the cell- Sn - Sn 2- 1M- -Ag - 1M- Ag is -

The correct option is A 0.94 volt Ag ^ + (aq)+ e ^ ⟶ Ag(s) Sn ^ 2+ (aq)+ 2e ^ ⟶ Sn(s) T= 25 ^ o C #160; #160; #160; #160; ...

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Redox Reactions

The standard ...

Question

The standard electrode potentials for the reactions
$A g^{+} (a q .) + e^{-} \to A g (s)$
$S n^{2 +} (a q .) + 2 e^{-} \to S n (s)$
at $25^{o} C$ are $0.80 v o l t$ and $- 0.14 v o l t$ respectively. The $e m f$ of the cell,
$S n | S n^{2 +} (1 M) | | A g^{+} (1 M) | A g$ is :

0.66 v o l t

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0.80 v o l t

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1.08 v o l t

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0.94 v o l t

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E_{F e^{3 +} / F e^{2 +}}^{\circ} = + 0.77 V; E_{S n^{2 +} / S n}^{\circ} = - 0.14 V

S n_{(s)} + 2 F e_{(a q)}^{3 +} \to 2 F e_{(a q)}^{2 +} + S n_{(a q)}^{2 +}

E^{o}

2 A g^{+} (a q) + S n^{2 +} (a q) \to S n^{4 +} (a q) + 2 A g (s)

A g (s) + \frac{1}{2} S n^{4 +} (a q) \to \frac{1}{2} S n^{2 +} (a q) + A g^{+} (a q)

N i (s) | N i^{2 +} (a q . 0.1 M) | | A g^{+} (a q . 0.1 M | A g (s)

E_{A g^{+} / A g}^{\circ} = 0.80 v o l t

E_{N i^{2 +} / N i}^{\circ} = - 0.25 v o l t

M g | M g^{2 +} (a q .) ∥ A g^{+} (a q .) | A g

25^{\circ} C

E_{M g^{2 +} / M g}^{\circ} = - 2.37 v o l t

E_{A g^{+} / A g}^{\circ} = + 0.80 v o l t

A g^{+} + e^{-} \to A g

0.80 v o l t

2 A g^{+} + 2 e^{-} \to 2 A g

1.60 v o l t

A g^{+}

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