What are crystalline hydrates? Explain it with example.

1.	What are crystalline hydrates? Explain it with example.
Answer» Solution : (i) In these, hydrogen bonding is very important. OFTEN the water molecules serve to fill in the interstices and bind together structure. (ii) A specific example is `CuSO_(4)5H_(2)O`. (iii) ALTHOUGH there are five water molecules for every divalent copper ion, only four are coordinated to the cation, it.s six-coordination being completed from sulphate ANIONS. The fifth water molecule is held in place of hydrogen bonds, O- H O, between it and TWO coordinated water molecules and then coordinate sulphate anion. (iv) Water forms hydrated salts during crystallization. Examples, `Na_(2)CO_(3)10H_(2)O`, `FeSO_(4).7H_(2)O`. (v) The water present in the hydrates is called as water of hydration

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