Question

1. how is plaster of paris obtained? what reaction is involved in the setting of a paste of plaster of paris? (1mark)

2.what color change is observed when hydrated copper sulphate is heated?

3.what preparations should be taken before preparation of plaster of paris?

Answer 1

hiii....

when gypsum is heated in 375 c them pop form  

It's obtained by heating gypsum at 100cin the presence of water molecules CaSO4+1/2H2O+2/2H2O➡ CaSO4+2H2O