Write the compound with water of cystallisation

Na2C03 10H2O is hydrated sodium carbonate salt or sodium carbonate with water of crystallisation.

Explanation:

The water atoms which are a piece of the structure of a precious stone of salt are called Water of crystallization.   The regular name and synthetic equation of an industrially significant compound which has ten water particles is Sodium Carbonate [washing soda]  

                                Na2CO3.10H2O  

Preparation:  

A cold and Concentrated Solution of Sodium chloride is responded with Ammonia and Carbon dioxide to get Sodium Hydrogen Carbonate.  

               NaCl +NH3 +H2O+CO2 - >NaHCO3 +NH4Cl  

Sodium Hydrogenarbonate is isolated by filtration, dried and warmed.  On warming, sodium hydrogen carbonate deteriorates to frame Sodium carbonate.  

                     2NaHCO3 - > Na2CO3 + CO2 + H2O  

Anhydrous sodium carbonate is broken down in water and to get 10 atoms of water of crystallization.  

                      Na2CO3+10H2O - >Na2CO3.10H2O