chemical effects of electricity

If we want  to conduct electric current it must contain charged particles to be able to conduct electric current. In solids, the current is carried by means of electrons. Copper, lead, aluminum, iron and carbon are few common examples of solid state conductors. In liquids and gases, the part of a molecule which has acquired an electric charge is a mean of conduction electric current, called ions. These ions may possess either a positive or negative charge, and their examples include the hydrogen ion H+, copper ion Cu++ and hydroxyl ion OH−. Distilled water possesses no ions and is considered as a poor form of conductor of electricity, on the other hand salt-water contains ions and is considerably a good conductor of electricity.

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