Electrolysis Of Brine

Question 1

Electrolysis of brine

Answer 1

Brine = Sodium Chloride solution

Ions in solution: Na+, Cl-, H+, OH-

Hydrogen gas given off at cathode.

Chlorine has given off at anode.

Sodium hydroxide left in solution.

Question 2

Diaphragm cell used for electrolysis

Answer 2

To make it easier to collect two gasses produced by each electrode

Question 3

Uses of products of reaction

Answer 3

Chlorine : sterilise water supplies, make bleach and HCl

Hydrogen: used in Haber process, change oils into fats for making margarine

Sodium hydroxide: widely used in chemical industry. Soap, bleach, paper pulp