Question

Why is sodium metal not obtained at cathode when aq of NaCl is electrolysed
With Pt electrodes but obtained when molten NaCl is electrolysed

Answer 1

Answer: Sodium metal and chlorine gas can be obtained with the electrolysis of molten sodium chloride.

Electrolysis of aqueous sodium chloride yields hydrogen and chlorine, with aqueous sodium hydroxide remaining in solution.

The reason for the difference is that the reduction of Na+ (E° = –2.7 v) is energetically more difficult than the reduction of water (–1.23 v).

Explanation:

Answer 2

$\huge\bold{HEY:)-}$

Sodium metal and chlorine gas can be obtained with the electrolysis of molten sodium chloride.

Electrolysis cell for molten sodium chlorideA commercial electrolysis cell for the production of metallic sodium and chlorine gas from molten NaCl. Liquid sodium floats to the top of the melt above the cathode and is drained off into a storage tank. Chlorine gas bubbles out of the melt above the anode.