Question

Preparation of plaster of paris by using chemical equation

Answer 1

chemically plaster of paris is called hemi hydrate (CaSO4.1/2H20 + 1.1/2H2O)

chemical formula =

CaSO4 2H20 gives us CaSO4.1/2H20 + 1.1/2H2O

Answer 2

on heating gypsum CaSO4.2H2O at 373 K it loses its water molecules and becomes CaSO4. half H2O
that is plaster of Paris

CaSO4. 2 H2O gives on heating CaSO4. half H2O and 1and half H2O