Chemical reactions in solutions play a very important role in chemistry. For example, sodium chloride does not conduct electricity in the solid state. However, when it is dissolved in water, it becomes good conductor of electricity. Michael Faraday classified the substances into two types:
Electrolytes and Non-electrolytes
Electrolytes:
The substances which conduct electricity in their molten states or in the form of their aqueous solutions are known as Electrolytes. For example: acids, bases and salts are all electrolytes.
Non-electrolytes:
The substances which do not conduct electricity in their molten states or in the form of their aqueous solutions are known as Non-Electrolytes. For example: sugar, urea, glycerin etc. are non-electrolytes.