Question

What happens when 1 and a half molecule of water is added to caso4.1/2h2o

Answer 1

CaSO4.1/2H2O is called plaster of Paris. When water is added to plaster of Paris it sets to form gypsum with the chemical formula CaSO4.2H2O.

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Answer 2

It forms gypsum( CaSO4.2H2O ).