What is the common ion effect?

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

The solubility of slightly soluble substances can be decreased by the presence of a common ion. This effect is known as common ion effect.

Addition of a common ion to a slightly soluble salt solution will add up to the concentration of the common ion. According to Le Chatelier's Principle that will place a stress upon the slightly soluble salt equilibria. Thus, the equilibrium will shift so as to undo the stress of added common ion.

Answered by  | 4th Jun, 2014, 03:23: PM