What happens when crystals of washing soda are left open in dry air? What is this change named as? Name two industries based on use of washing soda?
When crystals of washing soda are left open in dry air, they lose nine water molecules to form sodium carbonate monohydrate Na2CO3. 10H2O → Na2CO3.H2O + 9H2O.
Washing soda is used industrially as cleaning agent in laundry. Also it is used for softening hard water in industry.