Question

हाउ मेकिंग पाउडर is prepared.write it's chemical formula is uses​

Answer 1

Answer:

Plaster of Paris is calcium sulphate hemihydrate. Its chemical formula is: CaSO

4

.

2

1

H

2

O.

(b) It is prepared by heating gypsum to a temperature of 100

0

C in a kiln. It loses 3/4th of its water of crystallisation and forms plaster of Paris.

Gypsum

CaSO

4

.2H

2

O

Heat at 100

0

C

373k

Plaster of paris

CaSO

4

.

2

1

H

2

O

+

water

1

2

1

H

2

O

(c) Plaster of Paris should be stored in a moisture-proof container because the presence of moisture can cause the slow setting of the plaster of Paris by bringing about its hydration.

(d) Uses of plaster of Paris:

(i) It is used as a fire proofing material.

(ii) it is used in hospitals for setting fractured bones in the right position to ensure correct healing

Explanation:

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