Question

name and the color of the products formed in
List the important products of the Chlor-alkali process. Write one important use of each
OR
Hoy is washing soda prepared from sodium carbonate? Give its chemical equation State​

Answer 1

Explanation:

The Chlor-alkali process is used in the electrolysis of NaCl. The important products formed in this process is sodium hydroxide, chlorine and hydrogen gas.

2NaCl+2H

2

O⟶2NaOH+Cl

2

+H

2

An electric current is passed through the brine to form H

2

at the cathode and Cl

2

at the anode, leaving a solution of sodium hydroxide.

Uses:-

NaOH - For soaps and detergents.

Cl

2

- PVC, pesticides.

H

2

- Fuels, production of NH

3

.

Answer 2

Sodium hydroxide, Chlorine gas, and Hydrogen gas are the products of the Chloe-Alkali process.

Firstly, a cold and concentrated sodium chloride solution is reacted with ammonia and carbon dioxide to obtain sodium hydrogen carbonate.
The sodium hydrogen carbonate is slightly soluble in water, so it precipitates out as solid.

NaCl +NH3 +CO2 +H2O → NaHCO3 +NH4Cl

Secondly, now sodium hydrogen carbonate is separated by filtration, dried and heated. On heating sodium hydrogen carbonate decomposes to form sodium carbonate. This anhydrous sodium carbonate is known as soda ash.

2NaHCO3 → Na2CO3 +H2O +CO2
Soda ash

Thirdly, anhydrous sodium carbonate or soda ash is dissolved in water and recrystallised to get washing soda crystals containing 10 molecules of water of crystallisation.

Na2CO3 + 10H2O → Na2CO3.10H2O
Washing Soda