Question

Sodium Carbonate is prepared on large scale by:

• A. Solvay's process
• B. Beckmann's plants
• C. Hesenclover plant
• D. adding water to lime

Answer 1

Answer: (A)

Solvay's process

Sodium Carbonate $\left({Na}_2{CO}_3\right)$ is prepared on large scale by Solvay's Process.

Steps involved in Solvay's Process:

$\bullet$ Carbon dioxide reacts with the dissolved ammonia to form ammonium carbonate followed by ammonium hydrogen carbonate.

${2NH}_3+H_{2}O+{CO}_2\to \left({NH}_4\right){}_2{CO}_3$

$\bullet$ $\left({NH}_4\right){}_2{CO}_3+H_{2}O+{CO}_2\to {NH}_4{HCO}_3$

$\bullet$ ${NH}_4{HCO}_3+NaCl\to {NH}_{4}Cl+{NaHCO}_3$

$\bullet$ Sodium hydrogen carbonate crystal separates. These are heated to give sodium carbonate.

$2{NaHCO}_3\to {Na}_2{CO}_3+{CO}_2+H_{2}O$