Question

The standard emf of a galvanic cell involving cell reaction with n = 1 was found to be 0.592 V at 25°C. The equilibrium constant of the reaction would be ____________.

Options

• 10¹

• 10⁵

• 10⁸

• 10¹⁰

Answer 1

The standard emf of a galvanic cell involving cell reaction with n = 1 was found to be 0.592 V at 25°C. The equilibrium constant of the reaction would be 10¹⁰.

Explanation:

E⁰ = `0.0592/("n") log "K"`

0.592 = `0.0592/1 log "K"`

log K = `(0.592 xx 1)/0.0592` = 10

∴ K = Antilog [10] = 10¹⁰