From an electrolyte, one mole of electron will deposit at cathode — Electrochemistry Chemistry Question

💡 Solution & Explanation

One mole of electrons (1 Faraday) will deposit exactly one gram-equivalent weight of a substance at the cathode. The equivalent weights are: Cu = 63.5/2 = 31.75 g; Mg = 24/2 = 12 g; Na = 23/1 = 23 g; Al = 27/3 = 9.0 g. Thus, exactly 9.0 g of Al will be deposited. Therefore, correct answer is D.