Conduction of electricity : The conduction of electricity through a solution involves the movement of charged particles. A solution of an ionic compound in water contains ions, which move to the opposite electrodes, when electricity is passed through the solution.
Ionic compounds in the solid state do not conduct electricity because the movement of ions in the solid is not possible due to their rigid structure. But, ionic compounds conduct electricity in the molten state. Since the electrostatic forces of attraction between the oppositely charged ions are overcome and free ions are obtained due to heat. As a result, these ions move freely and conduct electricity.