Question

Explain water of crystallization

Explain your answer in briefly.......

Answer 1

a process that involves formation of pure solid crystals of a compound

Answer 2

Hello friend

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⭐⭐ Water of Crystallisation⭐⭐⭐

Let understand by an example....


Take some crystal of the blue vitriol (CuSO4.5H2O) in test tube.Heat the test tube on low flame of a burner.On heating,the crystalline structure of blue vitriol broke down to form a colourless powder and water came out .This water was part of crystal structure of blue vitriol.It is called water of crystallisation.

On adding water to the white powder a solution was formed which had the same colour as the solution in the first test tube.From this we come to know that no chemical change has occurred in the crystals of blue vitriol due to heating.Losing water on heating blue vitriol,breaking down of the crystals structure,losing blue colour and regaining blue colour on adding water are all physical changes.

CuSO4• 5H2O==>heat==> CuSO4 +5H2O

Similarly ferrous Sulfate crystals also contain 7 molecules of water of crystallisation which are lost on heating.The reaction is presented as :

FeSO4•7H2O ==>Heat==> FeSO4+7H2O

Ionic Compounds are crystalline in nature.These crystals are formed as a result of definite arrangement of ions.In the crystals of some Compounds water molecules are also included in this arrangement.This is the water of Crystallization.

The water of crystallisation is present in a definite proportion of the chemical formula of the compounds.

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