Chapter 13, Problem 13.83QP

Interpretation Introduction

Interpretation:

van’t Hoff factor of $0.40mN{a}_{3}P{O}_4$ aqueous solution whose boiling point is $100.78°C$ has to be calculated.

Concept introduction

Boiling point is the temperature at which liquid turns into a gas. Example: boiling point of water is $\text{100°C}$. That is water changes from liquid phase to gas phase.

${\text{ΔT}}_{\text{b}}{\text{= T}}_{\text{b}}-{\text{T}}_{\text{b}}^{\text{°}}$

Where,

${\text{ΔT}}_{\text{b}}$ is the change in boiling point

${\text{T}}_{\text{b}}$ is the boiling point of the solution

${\text{T}}_{\text{b}}^{\text{°}}$ is the boiling point of pure solvent

Boiling point elevation$(\Delta T_b)$ is distinction between boiling point of the pure solvent ${\text{(T}}_{\text{b}}^{\text{°}}\text{)}$ and the boiling point of the solution ${\text{(T}}_{\text{b}}\text{)}$.

${\text{ΔT}}_{\text{b}}{\text{= iK}}_{\text{b}}\text{m}$

Where,

${\text{ΔT}}_{\text{b}}$ is the change in boiling point

${\text{K}}_{\text{b}}$ is the Molal boiling point constant

m is the molality of the solution

i is van’t Hoff factor