What are crystalline hydrates? Explain it with example.

1.	What are crystalline hydrates? Explain it with example.
Answer» 1. In these, hydrogen bonding is very important. Often the water molecules serve to fill in the interstices and bind together structure. 2. A specific example is CuSO₄. 5H₂O. 3. 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. 4. Water forms hydrated salts during crystallization. Examples, Na₂CO₃ . 10H₂O, FeSO₄ .7H₂O. 5. The water present in the hydrates is called as water of hydration.

Answer»

1. In these, hydrogen bonding is very important. Often the water molecules serve to fill in the interstices and bind together structure.

2. A specific example is CuSO₄. 5H₂O.

3. 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.

4. Water forms hydrated salts during crystallization.

Examples, Na₂CO₃ . 10H₂O, FeSO₄ .7H₂O.

5. The water present in the hydrates is called as water of hydration.

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