Chemical reactions mostly take place in solutions. Solution chemistry
plays a very significant role in chemistry. All chemical substances are made up
of either polar units (called ions) or non-polar units. The activity of these
entities is more evident and pronounced in solution. The behaviour of these
substances depends upon their nature and conditions of the medium in which they
are added. It is therefore necessary to understand the principles that govern
their behaviour in solution.
This type of equilibrium is observed in substances that undergo ionization
easily, or in polar substances in which ionization can be induced. Ionic and
polar substances are more easily soluble in polar solvents because of the ease
of ionization taking place in the solvent medium. With the dissolution of ionic
and polar substances in the solvent, these solutions become rich in mobile
charge carriers (ions) and thus can conduct electricity. Substances, which are
capable of conducting electricity are called as electrolytes while those
substances which are non-conducting are called as non-electrolytes.