Q17 of 53 Page 60

What is the chemical formula for washing soda? How can it be obtained from baking soda? Describe two applications of washing soda.

the chemical formula for washing soda is - Na2CO3.10H2O

It is prepared by heating baking soda and then recrystallizing the product so obtained.


The equations related to the above reaction are:-


2NaHCO3 Na2CO3 + H2O + CO2


Na2CO3 + 10H2O → Na2CO3.10H2O


Two applications of washing soda are:-


1. It is used in glass, soap and paper industries


2. It is used for removing permanent hardness of water.


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