Chemistry - Liquid Solution Question with Solution | TestHub

Actual molecular weight of naphthoic acid${\text{(C}}_{\text{11}}{\text{H}}_{\text{8}}{\text{O}}_{\text{2}}\text{)}\text{=}\text{172}$
Molecular mass (calculated)$\text{=}\frac{\text{1000}\text{×}{\text{k}}_{\text{f}}\text{×}\text{w}}{\text{W}\text{×}{\text{ΔT}}_{\text{f}}}$
$=\frac{\text{1000 ×}\text{1}\text{.72}\text{×}\text{20}}{\text{50}\text{×}\text{2}}=344$
van't Hoff factor (i) =$\frac{\text{actual mol}\text{.wt}\text{.}}{\text{calculated mol}\text{.wt}\text{.}}\text{=}\frac{\text{172}}{\text{344}}$
$=0.5$