Write chemical formula of plaster of paris and it's advantages also.
Answers
It is light in weight and more durable.
It has low thermal conductivity.
It is very good fire resistant and hence a very good heat insulating material.
It does not shrink while setting. Therefore, it does not develop cracks on heating or setting.
It forms a thick surface to resist normal knocks after drying.
It mixes up easily with water and is easy to spread and level.
Chemical name of Plaster of Paris is Calcium sulphate hemihydrate.
Chemical formula of Plaster of paris =
CaSO4. 1/2 H2O
Use of Plaster of Paris:
It is also used in medicine to make plaster casts to immobilize broken bones while they heal, though some orthopedic casts are made of fiberglass or thermoplastics
It is commonly used to precast and hold parts of ornamental plaster work placed on ceilings and cornices.