Question

The theoretical molecular mass and observed molecular mass of an ionic compound AB are 58.2 and 30 respectively. Calculate the van’t Hoff factor and degree of dissociation.

Answer 1

Calculated molecular mass of AB = 58.2
Observed molecular mass of AB = 30

Degree of dissociation (α) = \(\frac { i-1 }{ n-1 }\)
Substance AB on dissociation gives 2 mol substance A and B. Hence,