CHEM 32 OBJECTIVES SHEET 4 (Sept 8) Spring 2009
Reading: Chapter 5: pages 5-1 through 5-27 (sections 5.1 through 5.5), and pages 5-32 through 5-38
(section 5.6) [Note: you do not need to know the information about other concentration units on pages
5-28 through 5-31.]
Objectives: By the time you have finished your work on this material, you should know the following
information:
1) The definition of the terms solution, solute, and solvent, and the difference between a solution and
a suspension.
2) The role of hydrogen bonding in determining whether a molecular compound can dissolve in
water.
3) How ionic compounds behave when they dissolve in water.
4) The fact that all ionic compounds that contain Na+ or K+ dissolve in water.
5) The definition of the terms solubility, saturated solution, and unsaturated solution.
6) The relationship between solubility, temperature, and pressure.
7) How the solubility of a molecular compound depends on the presence, number, and size of the
hydrophobic and hydrophilic regions in the molecule.
8) How to calculate a percent concentration, and how to use the percent concentration to calculate the
amount of solute in a solution.
9) How to calculate the mass of one mole of any compound, and how to use this mass to relate any
mass of the compound to the corresponding number of moles.
Homework Assignment 4 (due September 15):
Pages 5-7 and 5-8: problems 5.1 through 5.5
Page 5-15: problems 5.6, and 5.8 through 5.10
Page 5-19: problems 5.12 through 5.17
Page 5-23: problems 5.18 and 5.19
Pages 5-31 and 5-32: problems 5.20 (parts a and b only), and 5.21 through 5.24
Page 5-38: problems 5.29 through 5.34
Page 5-69: problem 5.61
Page 5-71: problem 5.73
Page 5-78: problems 5.115 and 5.123
Page 5-79: problem 5.131
For more practice on your own, you can always work through similar problems at the end of the chapter.
My website URL: http://www.ccsf.edu/Departments/Chemistry/pauly/index.htm
Do not look at the answers until you have seriously attempted all problems.
(To see the solutions, click on "Textbook Resources" on the class website.)
Reminder: The first exam is on September 22 and covers chapters 1 through 5. Begin to review the
earlier chapters and come to my office hours for help or go to the LAC in the library for free tutoring.
The LAC is on the second floor--ask for directions if you can't find it.