Concept explainers
Ice Cream A rock salt (NaCl), ice, and water mixture isused to cool milk and cream to make homemade icecream. How many grams of rock salt must be added towater to lower the freezing point by 10.0°C?
Interpretation:
The amount of rock saltis to be calculated.
Concept introduction:
For electrolytic solutes, the depression of the freezing point is directly proportional to molalityof the solution.
Freezing point depression
Answer to Problem 103A
157 gm of NaCl must be added in 1kg of solvent.
Explanation of Solution
Given information:
Write the expression for depression of the freezing point.
NaClis strong electrolyte, it dissociates completely in the solution to give two ions (Na+ and Cl- ion). So, i = 2
Calculate the number of moles of
(Note: Molecular weight of NaCl = 58.44 gm/mol)
Thus, 157 gm of NaCl must be added in 1kg of solvent.
Chapter 14 Solutions
Chemistry: Matter and Change
Additional Science Textbook Solutions
Inorganic Chemistry
Introductory Chemistry (5th Edition) (Standalone Book)
Essential Organic Chemistry (3rd Edition)
Organic Chemistry (9th Edition)
General Chemistry: Principles and Modern Applications (11th Edition)
Organic Chemistry
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY