Question

A compound which is prepared from gypsum has the property of hardening

when mixed with proper quantity of water. (5)

a) Identify the compound.

b) Write its chemical name

c) Write its chemical formula.

d) Write chemical equation to prepare the compound.

e) Mention one important use of the compound​

Answer 1

a) Plaster of Paris

b) Calcium sulphate hemihydrate

c) $CaSO_4. 1/2H_2O$

d) $CaSO_4. 2H_2O$ =$CaSO_4.1/2 H_2O+ 3/2 H_2O$

e) This is used as plasters by doctors for supporting the fractured bones in the right position.

Hope it helps

Answer 2

Answer:

a) --> Plaster of Paris

b) --> Calcium Sulphate hemihydrate

c) --> CaSO4 . 1/2H2O

d) --> CaSO4 .2H2O (in the presence of ∆)------>CaSO4 .1/2H2O + 1/2 H2O

e) --> It is used to set the fracture bones.