The reaction that takes place at the cathode when an aqueous solution of NaCI is electrolysed using carbon electrodes is
Question 1 Report
The reaction that takes place at the cathode when an aqueous solution of NaCI is electrolysed using carbon electrodes is
Answer Details
The reaction that takes place at the cathode when an aqueous solution of NaCl is electrolyzed using carbon electrodes is: - 2H+2(g) + 2e- → H2(g) During the electrolysis of an aqueous solution of NaCl using carbon electrodes, the NaCl molecules dissociate into Na+ and Cl- ions. The Na+ ions are attracted towards the cathode where they gain electrons and become sodium atoms which are deposited on the cathode. However, water molecules are also present in the solution and can be reduced instead of Na+ ions. The reduction of water molecules results in the production of hydrogen gas. The hydrogen gas bubbles out of the solution, and the overall reaction at the cathode can be represented as: 2H+(aq) + 2e- → H2(g) Therefore, option A is the correct answer.
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