Chapter 10, Problem 85QAP

Interpretation Introduction

Interpretation:

The mass percent of substance X is to be determined.

Concept introduction:

The formulas which will be used to calculate the mass percent of substance X are given below-

  $\Delta T_f=T_f°-T_f$

  $\Delta T_f=k_f\times molality(m)$

  $\text{molality=}\frac{\text{Moles of solute }}{\text{mass of solvent}}$

  $\mathrm{Total}numberofmoles=\frac{mass}{Molarmass}$

  $\text{mass percent of solute X=}\frac{\text{mass X}}{\text{mass of mixture}}\text{×100\%}$