Question

A white powder is used by doctors to support fractured bones

a) Write the name and chemical formula of the powder.

b) How is this powder prepared?
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Answer 1

Answer:

(a) plaster of paris ( CaSO4 . 1/2H20)

(b) this powder is prepared by heating gypsum (hydrated copper sulphate) at 373 k. The water disappear and plaster of paris (a white powder) is formed.

Answer 2

Answer:

A.)

This white powder name is :-plaster of Paris (calcium sulphate hemihydrate) .

It's Chemical formula is :- (Caso4).H2O

B.)

• Plaster of Paris is prepared from gypsum.
• Gypsum is heated to a temperature of 100⁰c .
• crystallization and forms Plaster of Paris.

Balanced Chemical equation:-

CaSO4.2H2O-----> CaSO4 .1/2H2O + 3/2 H2O.

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