The standard emf for the cell reaction, 2Cu⁺(aq) → Cu(s) + Cu²⁺(aq)

The standard emf for the cell reaction, 2Cu⁺(aq) → Cu(s) + Cu²⁺(aq) is +0.36 V at 298 K. The equilibrium constant of the reaction is

Options

(a) 5 ˣ 10⁶
(b) 1.4 ˣ 10¹²
(c) 7.4 ˣ 10¹²
(d) 1.2 ˣ 10⁶

Correct Answer:

1.2 ˣ 10⁶

Explanation:

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  • In equilibrium,
    (E)cell=0
    So, (E°)cell=(0.0591/2)logK
    => (0.36×2)÷0.0591=logK
    => logK=12.18
    => K=1.51×10^12

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