Chapter 13, Problem 120E

Interpretation Introduction

Interpretation:

“The freezing point of the solution”should be identified on addition of 1.35g of MgCl₂(i=2.5 for MgCl₂) if,50 mL of solution with 1.55% of ₂ of MgCl₂ by mass with a density of 1.05$\frac{\text{g}}{\text{mL}}$ is present.

Concept introduction:

a) The depression in freezing point is a colligative property.

∆${\text{T}}_{\text{f}}\text{=i}{\text{.K}}_{\text{f}}\text{.m}$

Where

∆${\text{T}}_{\text{f}}$ = Depression in freezing point

i = Van’t Hoff factor

${\text{K}}_{\text{f}}\text{=1}\text{.86}\frac{{}^{\text{o}}\text{C}}{\text{Kg}\text{.m}}$

m = molality