During the electrolysis of an aqueous salt solution, the pH in the space near one of the electrode w — Electrochemistry Chemistry Question

💡 Solution & Explanation

Electrolysis of very dilute NaCl is equivalent to the electrolysis of water. At the cathode, $2H_2O + 2e^- \rightarrow H_2 + 2OH^-$ (pH increases). At the anode, $2H_2O \rightarrow O_2 + 4H^+ + 4e^-$ (pH decreases). Therefore, correct answer is A.