The formula of Plaster of Paris is CaSO4 . ½ H2O, it is to be noted that half water molecule is shown to be attached as water of crystallization. This indicates that
A.) Only half water molecule is present in Calcium Sulphate crystal
B.) Two formula units of Calcium Sulphate share one molecule of water.
C.) Two formula units of calcium Sulphate share two molecules of water
D.) Two formula units of Calcium Sulphate share one and a half molecules of water.
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Answer:
Plaster of Paris is Calcium Sulphate Hemihydrate
b) Two formula units of CaSO4 share one molecule of water so that the effective water of crystallization for one CaSO4 unit comes to half molecule of water.
C.) Two formula units of calcium Sulphate share two molecules of water
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