Question

state the numbers of water molecules present in crystal of washing soda and plaster of paris. what are these water molecules called

Answer 1

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No. of water molecules in washing soda:10
No. of water molecules in palster of paris:1/2
These molecules are named as Water of crystallisation..

Answer 2

The Number of water molecules in the washing soda is 10   and the number of water molecules in the palster of paris is $\frac{1}{2}.$ Thsese water molecules are known to as "Water of crystallisation".

Explanation:

• The formula of washing soda is $Na_2CO_3. 10H_2O$. The formula of plaster of paris is $2CaSO_4 . H_2O$

• The water of crystallization is referred to as water which has been bounded stoichiometrically into the crystal.
• The Crystal salts are containing the "water of crystallization" are known as hydrates.
• The Water of crystallization is also called as the "crystallization water" or "water of hydration".

To know more:

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