Question

name the hard substance used to make plaster of paris? How pop is prepared with the help of this substance?
pls provide correct information and answer!

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

gypsum is the hard substance used to make pop.
Preparation of plaster of Paris :
plaster of Paris prepared by heating gypsum (CaSo4.2H2O)to a temperature of 100degree Celsius in a kiln. When gypsum is heated to a temperature of 100 degree Celsius, it loses three-fourths of its water of crystallisation and form pop.
CaSO4.2H2O____heat____CaSO4.1/2H2O+1 1/2H2O