Question

Copper is conducting as such while copper sulphate is conducting only in molten state or in aquous solution give reason

Answer 1

Understanding :
1) We know that, a substance conducts electricity when its constituent ions are free /moblie in that state.

2) Copper sulphate solution acts as Electrolyte Because It dissociate into its constituent mobile ions which are free to move in molten or aqueous solution and not tightly bonded unlike in case of lattice in solid.

3) In aqueous /molten solution,
it dissociate as
CuSO4(aq.) ++++++> Cu2+(aq.) + SO4(2-) (aq.)
These ions are respobsilble for the conduction of electric current in solution.

4)
However, in solid state,
These ions are tightly bonded in a crystal lattice without any free motion , and hence couldn't conduct electricity.


But, you can say that we can break lattice and then conduct electric current.

If so, just think about Lattice Enthalpy of this Compound which is much higher than we can imagine.
Thus, Required Statement is true.

Answer 2

We have three types of bonds :

1.) Bonds between metals - Metallic bonds.

2.) Bonds between non metals - Covalent bonds

3.) Bonds between metals and non metals - Ionic bonds

Metallic bonds form structures which conduct electricity in both liquid and solid state.

This is because they have electrons that are mobile within their structures.

Ionic bonds form structures which conduct electricity only in liquid state that is in solution form.