What volume of H2 at 0°C and 1 atm is formed per hour? — Electrochemistry Chemistry Question

💡 Solution & Explanation

The current efficiency for H2 formation is 100% - 60% = 40%. Effective charge for H2 = 0.40 × 54,000 C = 21,600 C. Number of Faradays = 21,600 / 96,500 = 0.2238 F. The reduction of 2H+ to H2 requires 2 Faradays per mole of H2. Moles of H2 = 0.2238 / 2 = 0.1119 mol. Volume of H2 at STP (0°C, 1 atm) = 0.1119 mol × 22.4 L/mol ≈ 2.50 L. Therefore, correct answer is C.