Question

write the steps of preparation sodium carbonate decahydrate write any one chemical property of it​

Answer 1

Answer:

Washing soda finds its application in numerous ways, be it from household uses to a vast range of industrial applications. It is an alkaline compound with a high alkaline character which has the capability to remove adamant stains from clothes during washing. Washing soda formula is written as Na2CO3.10H2O. The chemical name of washing soda is sodium carbonate. Chemically soda ash is a hydrated salt of sodium carbonate.

Answer 2

Answer:

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

The preparation of Sodium Carbonate is also known as Solvay process. But before that calcium carbonate (limestone) was heated to release carbon dioxide.

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