Question

how is sodium hydrogen carbonate prepared? give reaction also, how is sodium carbonate prepared? give reaction

Answer 1

sodium chloride reacts with ammonia , carbon
dioxide and water to give NaHCO3

Formation of sodium carbonate. The sodium hydrogencarbonate is heated in rotating ovens at 450 K so that it decomposes to sodium carbonate, water and carbon dioxide: 

Answer 2

heya
the common name of sodium hydrogen carbonate is baking soda.
the formula of baking soda is NaHCO3.
it is also called sodium bicarbonate.
sodium hydrogen carbonate is produced on a large scale by reacting a cold and concentrated solution of sodium chloride(NaCl called brine) with ammonia(NH3) and carbon dioxide(CO2).


NaCl + NH3 + H2O + CO2 ➡ NaHCO3 + NHCl4.
hope it helps