Hi,

Dissociation    i<1i<1
Association    i>1i>1
No association or dissociation    i=1

The association or dissociation of solute particles in a solution results in a decrease or increase in the molar mass of the solute particles. This results in abnormal molar mass.

Van’t Hoff’s “i” factor is used to express this extent of association or dissociation of solutes in solution.

Thanks