Sodium Hydrogen Carbonate Basic Justify Statement Converted Into Washing Soda Explain

"Sodium hydrogen carbonate is a basic salt." Justify the statement How is it converted into washing soda ? Explain.


It is a salt produced by the neutralization reaction between a strong base (NaOH) and a weak acid (H2CO3), hence it is a basic salt. 

 It is heated strongly to produce sodium carbonate. 

Sodium carbonate is recrystallized to produce washing soda. 
Na2CO3 + 10H2O → Na2CO3.10H2O.