The chemical formula for plaster of Paris is:

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Q.
The chemical formula for plaster of Paris is:

1 $C a S O_{4} \cdot 2 H_{2} O$

2 $C a S O_{4} \cdot H_{2} O$

3 $C a S O_{4} \cdot 1 / 2 H_{2} O$

4 $2 C a S O_{4} \cdot H_{2} O$

Ans.
(3)

The chemical formula of plaster of Paris is $C a S O_{4} \cdot 1 / 2 H_{2} O$ . The half a molecule of water in the formula means that two molecules of $C a S O_{4}$ share one molecule of water so that the effective water of crystallisation for one $C a S O_{4}$ unit comes to half a molecule of water.

Solution

Q.
The chemical formula for plaster of Paris is:

1 $C a S O_{4} \cdot 2 H_{2} O$

2 $C a S O_{4} \cdot H_{2} O$

3 $C a S O_{4} \cdot 1 / 2 H_{2} O$

4 $2 C a S O_{4} \cdot H_{2} O$

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Solution

Q. The chemical formula for plaster of Paris is:

1 CaSO4·2H2O

2 CaSO4·H2O

3 CaSO4·1/2H2O

4 2CaSO4·H2O

Ans. (3) The chemical formula of plaster of Paris is CaSO4·1/2H2O. The half a molecule of water in the formula means that two molecules of CaSO4 share one molecule of water so that the effective water of crystallisation for one CaSO4 unit comes to half a molecule of water.

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Q.
The chemical formula for plaster of Paris is:

1 $C a S O_{4} \cdot 2 H_{2} O$

2 $C a S O_{4} \cdot H_{2} O$

3 $C a S O_{4} \cdot 1 / 2 H_{2} O$

4 $2 C a S O_{4} \cdot H_{2} O$