Question

A compound which is prepared from the gypsum has property of hardening when mixed with right quantity of water
1. Identify the compound and write its chemical formula.
2. Write the chemical equation for the preparation

Answer 1

1)plaster of paris CaSO4•1/2H2O
2)CaSO4•2H2O------------'->CaSO4•1/2H2O +3/2H2O

Answer 2

The compound is Plaster of Paris.
Chemical Formula : CaSO4 . 1/2 H2O

Preperation : CaSO4 . 2 H2O ----heated---> CaSO4 . 1/2 H2O + 1 1/2 H2O

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