Question

A substance reacts with another substance B to produce the product C and a gas D. If a mixture of the gas D and ammonia is passed through an aqueous solution of C , baking soda is formed. The substances A and B are ??

Answer 1

Hence, A and B are HCl and Na2CO3

Answer 2

A = H Cl Hydrochloric acid.(aq)
B = Soda Ash Sodium Carbonate (s)

2 HCl (aq) + Na₂ CO₃ (s) ==> 2 Na Cl (aq) + CO₂ (g) + H₂O (l)

C = Na Cl (aq)
D = CO₂ (g)

The second reaction is called the Solvay process for industrial production of Baking soda or Sodium Bicarbonate.

Na Cl (aq) + NH₃ (g) + CO₂ (g) + H₂O (l) => NH₄ Cl (l) + Na HCO₃ (s)

Baking Soda is a white Crystalline solid powder.