Question

Give reasons why:

1. Sodium Chloride will conduct electricity only in fused or aq. soln. state.

2. In the electroplating of an article with silver, the electrolyte sodium argentocyanide soln. is preferred over silver nitrate solution.

3. Although copper is a good conductor of electricity,it is a non-electrolyte. 

Answer 1

1. Sodium chloride is a solid, ionic compound, it has strong electrostatic forces of attraction. Only in the fused or aqueous solution, it forms ions which are capable of conducting electricity.

2. It is preferred over silver nitrate because the dissociation of AgNO₃ will be very fast and deposit will not be smooth and uniform.

3. Because it does not form ions.