Question

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water.' (a) identify the compound and write its chemical formula. (b) write the chemical equation for its preparation. (c) mention any one use of the compound.

Answer 1

a)Plaster of Paris

chemical formula:Calcium sulphate hemihydrate.

b)Gypsum----------->pop+one and half hydrogen

CaSO4.2H2O--------->CaSo4.1/2hydrogen+1.1/2 hydrogen

c)This compound plaster of Paris is used to plaster the broken bone.

Answer 2

(a)Compound-Calcium Sulphate Hemihydrate(CaSO4.1/2H20)

(b)CaSO4.2H2O-------------->CaSO4.1/2H20 + 3/2H2O

(c)Uses-used to prepare false ceilings and plaster bones