Question

Explain the common ion effect with help of ionization of methyl orange.​

Answer 1

Answer:

The common ion effect refers to the decrease solubility of an ionic precipitate by the addition to the solution

Answer 2

Explanation:

Common ion effect: When a salt containing a common ion (an ion which is already in the given ionic solution)is added to an ionic equilibrium, then the equilibrium shifts to the backward direction.

This effect cased by the added ion is called as common ion effect.

Ex: For a reaction,

AB ⇔ A+ + B- ,

If the salt AC or BD (containing either B- or A+ ions) is added the equilibrium will be reversed.

Ex: CH3COOH ⇔ CH3COO- + H+ ...1

If the salt of acetic acid is added, CH3COONa then it ionizes completely in the solution and gives the common ion as:

CH3COONa ⇔ CH3COO- + Na+

As a result the concentration of CH3COO- ion increases and equilibrium 1. shifts backward. that is dissociation of acetic acid is further suppressed and formation of acetic acid increases.