Question

Sodium hydroxide is manufacture by the electrolysis of brine solution. The reaction by-products are:

Answer 1

Answer:

The by products are Cl2 and H2 gasses that are liberated during the reaction.

Explanation:

The electrolysis of brine solution to prepare sodium hydroxide can be given as follow:

NaCl(conc.) ⇌ (Na+)  + (Cl− )

 

H2 O ⇌ (H+)  + (OH− )

 

At cathode: 2H  +  2e−  → H2 ↑

At anode: 2Cl−  →Cl2 ↑ + 2e−

( Na+)  + (OH−)  → NaOH