Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN: 9781285199047
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Chapter 13.7, Problem 13.11PSP
Interpretation Introduction

Interpretation:

Addition of 1.20 kg ethylene glycol would be sufficient or not to prevent the solution from freezing if the temperature drops to -25oC has to be shown using calculation.

Concept introduction

Freezing point is the temperature at which liquid turns into solid.

The Freezing point depression(ΔTf) is indicated as ΔTf= Kfm

Where,

ΔTf Change in freezing point

Kf Molal freezing point constant

m Molality of the solution

From given mass of substance moles could be calculated by using the following formula,

  Molesofsubstance GivenmassofsubstanceMolecularmass

Molality: It is a measure of the concentration of a solute in a solution in terms of amount of substance in the amount of mass of solvent.

  m=molkg

Where, m is molality; mole is moles of solute and kg is mass of solvent.

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Chapter 13 Solutions

Chemistry: The Molecular Science

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