Chapter 10, Problem 35QAP

Interpretation Introduction

Interpretation:

To calculate the mass of naphthalene.

Concept introduction:

Raoult’s law depicts that vapor pressure of solvent in a mixture is equal to the product of mole fraction of solvent and vapor pressure of the pure solvent.

$P_{\text{solvent}}=X_{\text{solvent}}\times P^0{}_{\text{solvent}}$

Where, $P_{\text{solvent}}$ is vapor pressure of solvent in a mixture, $X_{\text{solvent}}$ is mole fraction of solvent and $P^0{}_{\text{solvent}}$ is vapor pressure of pure solvent.

Formula to calculate moles is-

$\text{Number}\text{of moles=}\frac{\text{Mass}}{\text{Molar}\text{mass}}$