Question

What is washing soda what is the action of heat on it?

Answer 1

washing soda is sodium carbonate and in heat it reacts with gypsum to form plaster of paris

Answer 2

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washing soda is sodiyam by carbonate, and it's chemical formula is Na2CO3.10H2O. so washing soda is hydrated salt of sodium carbonate containing 10 molecules of water of crystallization. but the anhydrous sodium carbonate which doesn't have any molecule of water of crystallization is commonly known as Soda ash.

Action of heat:-
when the crystals of washing soda are heated strongly then all the water of crystallization evaporates leaving behind anhydrous sodium carbonate.
Na2CO3.10H2O = NaCO3 +10H2O

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