In the electrolysis of a concentrated solution of sodium ...
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-
Correct answer is D
In the electrolysis of conc. NaCl,
anions = Cl−andOH−
cations = H+andNa+
So, hydrogen ion will migrate to the cathode, and Cl ion will migrate to the anode at the expense of hydroxide ion because of higher concentration in the solution
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