Why is plaster of paris written as Caso4.1/2H2O? how is it possible to have half a water molecule attached to CuSO4?
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Answered by
541
Plaster of paris is Calcium sulphate hemihydrate . [CaSO4.1/2 H2O]
Please Note that it is not possible to have a half a molecule of water.
The Formula actual means that two molecules ( or two formula units ) of CaSO4 share one moecule of water so that the effective water of crystallisation for one CaSO4 unit comes to half molecule of water.
The formula of plaster of paris can be written as 2CaSO4.H2O
2(CaSO4.2H2O) -----> 2CaSO4.H20 + 3 H2O
on heating
Please Note that it is not possible to have a half a molecule of water.
The Formula actual means that two molecules ( or two formula units ) of CaSO4 share one moecule of water so that the effective water of crystallisation for one CaSO4 unit comes to half molecule of water.
The formula of plaster of paris can be written as 2CaSO4.H2O
2(CaSO4.2H2O) -----> 2CaSO4.H20 + 3 H2O
on heating
Answered by
15
Plaster of paris is Calcium sulphate hemihydrate . [CaSO4.1/2 H2O]
Please Note that it is not possible to have a half a molecule of water.
The Formula actual means that two molecules ( or two formula units ) of CaSO4 share one moecule of water so that the effective water of crystallisation for one CaSO4 unit comes to half molecule of water.
The formula of plaster of paris can be written as 2CaSO4.H2O
2(CaSO4.2H2O) -----> 2CaSO4.H20 + 3 H2O
on heating
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