Question

explain vant's Hoff factor

Answer 1

vant hoff factor refers to the ratio of the total no. of particles after dissociation of a solute to the total no. of particles before dissociation of the solute in the solution.

or,

it is the ratio of the normal mass of the solute to the abnormal mass of the solute

Answer 2

The van 't Hoff factor i is a measure of the effect of a solute upon colligative properties such as osmotic pressure, relative lowering in vapor pressure, boiling-point elevation and freezing-point depression. 

The van't Hoff factor, symbol i, expresses how may ions and particles are formed (on an average) in a solution from one formula unit of solute. Examples: One formula unit of NaCl will create two particles in solution, a Na+ ion and a Cl- ion.