(π=w×1000M×V×R×T)
(M=w×1000π×V×R×T)
(=1.26×1000×0.083×3002.57×10−3×200)
=61038g(mol–1)
Van toff factor is used to determine the extent of association or dissociation of solute in the solvent.
i=Normalmolecularmassobservedmolecularmass
In case of association the i value is less than one
In case of dissociation the i value is more than one
In case there is no association or dissociation the value is equals to one.