Chemistry and Chemical Reactivity (9th Edition)

by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.

Published by Cengage Learning

ISBN 10: 1133949649

ISBN 13: 978-1-13394-964-0

Chapter 1 Basic Concepts of Chemistry - Study Questions - Page 21c: 34

Answer

Colligative properties like elevation of boiling point or depression of freezing point are proportional to the number of "units" dissolved. For ionic compounds like salt, it would be 2, and for molecular compounds like sugar, it would be 1. Therefore, these properties would be twice as intense for salt than for sugar, which would allow you to decide which substance it is, if you know the effect caused by at least one of them.

Work Step by Step

Colligative properties like elevation of boiling point or depression of freezing point are proportional to the number of "units" dissolved. For ionic compounds like salt it would be 2 and for molecular compounds like sugar it would be 1. Therefore these properties would be twice as intense for salt than for sugar, which would allow you to decide which substance it is, if you know the effect caused by at least one of them.

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