The standard emf for the cell reaction- Zn - Cu2- Zn2- - Cuis 1-10 volt at 25-C- The emf for the cell reaction when 0-1 M Cu2- and 0-1 M Zn2- solutions are used at 25-C is-

The correct option is A 1.10 volt E= E ^ 0 0.059 / n log K where E ^ 0 =1.10 V Zn+ Cu ^ 2+ (0.1M)→ Zn ^ 2+ (0.1M)+Cu Thus, n=2. So, ...

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The standard emf for the cell reaction,
$Z n + C u^{2 +} \to Z n^{2 +} + C u$
is $1.10 v o l t$ at $25^{\circ} C$ . The emf for the cell reaction when $0.1 M C u^{2 +}$ and $0.1 M Z n^{2 +}$ solutions are used at $25^{\circ} C$ is:

1.10 v o l t

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0.110 v o l t

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- 1.10 v o l t

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- 0.110 v o l t

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E^{\circ}

Z n (s) | Z n^{2 +} (1 M) a q . | C u (s)

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25^{\circ} C

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Z n + {C u}^{2 +} ⟶ C u + {Z n}^{2 +}

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A g / A g^{+} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = - 0.46 v o l t

Z n / Z n^{2 +} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = + 1.10 v o l t

Z n | Z n^{2 +} (1 M) ∥ A g^{+} (1 M) | A g

Z n + {C u}^{2 +} ⟶ {Z n}^{2 +} C u

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Z n (s) | Z n^{2 +} 1 M (a q .) ∥ C u^{2 +} 1 M (a q .) | C u (s)

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