Question

give reason. only one half of water molecule is shown in the formula of plaster of paris​

Answer 1

Answer:

It is in the form of a white powder. When the powder of Plaster of Paris is mixed with water, it becomes hard and solid gypsum. ... In , only half a water molecule is shown as the water of crystallization because two molecules of CaSO4 share one molecule of water

Answer 2

Only one half of water molecule is shown in the formula of plaster of paris​ as one molecule of water is being shared by two molecules of CaSO4 ( calcium sulfate).

It is therefore known as calcium sulfate hemihydrate. The chemical formula is: CaSO4. 1/2 H2O .

Plaster of Paris is actually gypsum plaster in a powder form that hardens on addition of water. It is said to be prepared using Gypsum which is a known mineral.

It is used for making sculptures, and also in the construction of buildings.