Question

Explain chlor alkali method for production of sodium hydroxide and give usefulness of products​

Answer 1

Explanation:

The chlor-alkali industry uses brine (salt water) to produce chlorine, sodium hydroxide (NaOH or caustic soda), and hydrogen. An electric current is passed through the brine, to form hydrogen gas at the negative electrode and chlorine gas at the positive electrode, leaving a solution of sodium hydroxide

Answer 2

Answer:

Preparation:

When an aqueous solution of sodium chloride (brine) is electrolysed, chlorine gas is liberated at anode and hydrogen gas at cathode. During electrolysis, sodium hydroxide is formed in the solution.

2NaCl(aq) + 2H₂O(1)→ 2NaOH(aq) + Cl₂(g) + H₂(g)

This process is called chlor-alkali process since the products formed are-chlor for chlorine and alkali for sodium hydroxide.

The three products (H₂(g). Cl₂(g). NaOH) produced in this process are useful.

Uses:

(1) De-greasing of metals.

(2) In the preparation of soap and detergent.

(3) In purification of petroleum.

(4) For making artificial textile fibres.

(5) As a reagent in laboratory.

(6) For making cotton unshrinkable.

(7) In paper industry.