Question

why is plaster of paris written caso4 of half H2O how it is possible to have a half of water molecule attached to caso4


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Answer 1

Answer:

itz mean two cupper sulphate solution have a common water compound

I am also studing in 10th

sir told this to me when i ask

then i ask why

sir told that you will study in 11 or 12

Itz always happen when ever i ask doubt sir always

tell you will study in 12 or 11

if it had happen then giveThanks

Answer 2

ap question Dana SA pahala mujha sa puchlaya Karo Ka agar mujha question ata ho to ma ap ko bat du

(☞ﾟ∀ﾟ)☞Answer:-

Plaster of Paris is calcium sulphate hemihydrate . The formula for Plaster of Paris is CaSO₄.

$\frac{1}{2}$

H₂O.

Plaster of Paris is prepared from Gypsum. Gypsum is calcium sulphate dihydrate [ CaSO₄. 2 H₂O ]

Plaster of Paris is prepared by heating Gypsum to a temperature of 100°C in a kiln.

When gypsum is heated , it loses three fourth of its water of crystallization and forms plaster of Paris .

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

It is not possible to have half molecule of water. The formula CaSO₄.1/2 H₂O means that two formula units of CaSO₄ shares one molecule of water , in such a way that the effective water of crystallisation of one particular unit of calcium sulphate comes to 1/2 molecule of water.

Plaster of Paris = 2CaSO₄.1/2H₂O , OR , CaSO₄.1/2 H₂O

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