Question

pls give full reaction of plaster of paris.

Answer 1

Plaster of Paris is made by heating the mineral gypsum. Large deposits were originally found outside of Paris in France hence its name. When gypsum is heated to about 150°C it losses water and produces the powder, plaster of Paris

Descriptively: Gypsum =heat→ Plaster of Paris + steam

Chemically: 2CaSO4·2H2O + heat → 2CaSO4·½H2O + 3H2O

So, the chemical formula for plaster of paris is CaSO4·½H2O.

When water is added to the plaster of Paris powder it rehydrates (absorbs water) and quickly hardens.

Descriptively: Plaster of Paris + water → Gypsum + heat

2CaSO4·½H2O + 3H2O → 2CaSO4·2H2O + heat

Plaster of Paris can be used for casts to hold broken limbs in place, modeling casts, sculptures and in plasterboard walls and ceilings, commonly called Gyprock.

Answer 2

the answer is enclosed in the above attachment...
hope it helps....