Question

1.How are water molecules bonded to the metal ion or anion? What happens to them on heating?

2. What may happen to the crystal structure and color of a compound when it is dehdrated?

Answer 1

Answer : The bond between a water molecule and the metal ion is generally called a dative covalant bond.

metal aqua ions are always accompanied in solution by solvated anions .

Now metal ion forms cations and they stick towards the O atom of water . and non metal tends to form anion which attached towards the H atom . And form a dative covalant bond.

On heating the bond between them is start breaking generaly the Hydrogen bonded are break and evolve as a steam ( vapour form} .

2. when the crystal structure and color of a compound is dehydrated then there structure is different and it is totally deferent color and structure as compare to hydtaed crystal.