Which is the chemical formula of Washing Soda

GC Acids Bases Salts

Which one of the following is the chemical formula of Washing Soda?

  1. NaCO3
  2. Na2CO3.10H2O
  3. Na2CO3.5H2O
  4. NaOH

Answer

Washing soda is obtained from sodium chloride. Sodium carbonate can be obtained by heating baking soda. Re-crystallisation of sodium carbonate gives washing soda. It is also a basic salt.

Na2CO3 + 10H2O → Na2CO3.10H2O

The correct option is B.