A current of 10 . 0 A flows for 2 . 00 h through an electrolytic cell containing a molten salt of metal X . This results in the decomposition of 0 . 250 mol of metal X at the cathode. The oxidation state of X in the molten salt is: F = 96 , 500 C

Question

A current of 10 . 0 A flows for 2 . 00 h through an electrolytic cell containing a molten salt of metal X . This results in the decomposition of 0 . 250 mol of metal X at the cathode. The oxidation state of X in the molten salt is: F = 96 , 500 C, 1 +, 4 +, 3 +, 2 +

MARKS App · Accepted Answer

Quantity of Electricity = 1 0 × 3 6 0 0 × 2 9 6 5 0 0 = 0 .746 ≈ 0 .75 F . If oxidation state is n + for 1 mol deposition of a metal: Electricity = nF (Faradays) For 0 . 250 mol = 0.250 nF ∴ 0.250 nF = 0.75 F n = 3

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