In the electrolysis of a concentrated solution of sodium chloride using electrodes, which of the following ions are discharged at the cathode and anode respectively?
- Na+ and Cl-
- Na+ and OH-
- H+ and OH-
-
H+ and Cl-
The correct answer is: D
Explanation
The electrolysis of sodium chloride solution, also known as brine, produces chlorine gas at the anode and hydrogen gas at the cathode. Sodium hydroxide is also formed as a by-product, depending on the concentration of sodium chloride in water. During the electrolysis of a concentrated sodium chloride solution, hydrogen ions are discharged at the cathode and chloride ions are discharged at the anode.