Common Ion effect is a useful application in?

Explanation

The common ion effect is an effect that suppresses the ionisation of an electrolyte when another electrolyte (which contains an ion which is also present in the first electrolyte, i.e. a common ion) is added. It is considered to be a consequence of Le Chatelier's principle (or the Equilibrium Law).Qualitative analysis of a salt Analysis is a chemical technique used to identify the ions present in a salt by analysing its physical and chemical properties and hence determine the identity of the salt. It determines only the presence or absence of a particular ion in a given salt. Common ion effect is a practical application of qualitative salt analysis in chemistry.