Question

1.
a) Identify the compound of calcium which is used for plastering of fractured bones. With
the help of chemical equation show how it is prepared.
b) What special precautions should be taken during the preparation of this compound?
Give the equation for this precaution.
c) Mention other use, than the one mentioned in the question.
е опе есепте часос.​

Answer 1

Answer:

plaster of Paris is a compound of factured bone

Answer 2

a) Calcium sulphate hemihydrate ( Plaster of Paris )

Chemical formula: CaSO₄·½H₂O

It is prepared by the heating of gypsum

CaSO₄·2H₂O----∆----> CaSO₄·½H₂O + 3/2 H₂O

b)Temperature should be controlled very carefully, while preparing plaster of paris from gypsum heat must be controlled as overheating may result in loss of entire water of crystallization resulting in formation of dead plaster

CaSO₄·½H₂O---∆---> CaSO₄

c) Plaster of Paris is used in making of statues