Chapter 11, Problem 11.97AP

Interpretation Introduction

Interpretation: ${\text{CaCl}}_{\text{2}}$ is given to be used for melting the ice on the sidewalks. The possibility of using ${\text{CaCl}}_{\text{2}}$ in melting ice at $-\text{20}°\text{C}$ is to be stated.

Concept introduction: When a salt like ${\text{CaCl}}_{\text{2}}$ is mixed with water, it behaves as an impurity. As a result freezing point of water decreases. Molality is defined as the number of moles of solute present per kilogram of solvent.

To determine: The possibility of using ${\text{CaCl}}_{\text{2}}$ in melting ice at $-\text{20}°\text{C}$.