Ionic Solids are solids which are composed of oppositely charged ions such as KCl. They consist of a positively charged cation and a negatively charged anion .
When Ionic Solids dissolve in water the cations and the anions separate, and become free to move about in water thereby allowing the solution to conduct electrical current.
The solid cannot conduct electricity because the ions are immobile and held in fixed positions in the crystal by strong electrostatic forces.
