A current of 3.7 A is passed for 6 h between nickel electrodes in 0.50 l of 2 M solution of Ni(NO3)2 — Electrochemistry Chemistry Question

💡 Solution & Explanation

Because active nickel electrodes are used, the nickel anode undergoes oxidation (dissolution) at the exact same rate that Ni2+ ions are reduced (deposited) at the cathode. As a result, the concentration of Ni2+ in the solution remains completely unchanged. Therefore, correct answer is D.