Question

define the water of crystallisation

Answer 1

In chemistry, water of crystallization or water of hydration is water molecules that are present inside crystals. Water is often incorporated in the formation of crystals from aqueous solutions.

Answer 2

$water \: molecules \: forming \: an \: \\ essential \: part \: of \: the \: crystall \: structure \: \\ of \: some \: compounds$