CH 222 Chapter Guides

Chapter Guide Five: Overview | Resources | Practice

  Overview of Chapter Guide Five

Chapter 11 explores the behaviors of solutions, and remember that a solution has both a solute and a solvent. The first part of Chapter 11 introduces new concentration definitions, including molality, weight percent and mole fraction. We will use these definitions when discussing the colligative properties - a series of behaviors exhibited by solutions. We will explore Henry's Law (gases in a solvent), Raoult's Law (vapor pressure depression), boiling point elevation, freezing point elevation, and osmosis. Finally, we shall briefly explore the Tyndall Effect which occurs from colloids and suspension, special forms of "solutions" where the solute particle size is quite large.

For a complete list of important concepts in Chapter 11, see the Chapter 11 Study Guide.

  Resources for Chapter Guide Five

For this module, you should read Chapter 11 in your textbook.

The following screencasts and Complete Lectures might prove useful to you as you study this chapter.

The Chapter Eleven lecture notes which accompany this lesson will be helpful when going through this section. These are Web versions of the lecture notes used in the "normal" CH 222 class and should let you see what is important in this chapter. You can also view the Lecture Notes in presentation software for Chapter 11 (Keynote, PowerPoint).

A variety of handouts are available from Chapter Four Part II and Chapter 5. Feel free to explore all of them or just the ones which give you difficulty.

Once you have mastered the concepts listed above, check out the the Chapter Eleven Concept Guide for a series of worked problems relating to this module. They will help you to ensure the mastery of the knowledge from this section.

Finally, test yourself (and get extra-credit in the bargain!) on the following chemistry concepts. If you get 9 out of 10 correct (or some multiple thereof), submit the information to receive extra credit.

  1. Raoult's Law - One Volatile Component
  2. Freezing and Boiling Points of Aqueous Solutions
  3. Molar Mass by Freezing Point Depression
  4. Osmotic Pressure

  Practice the Concepts of Chapter Guide Five

Complete problem set #5 to further explore solids and colligative properties. Problem set #5 covers several questions from Chapter 10 and Chapter 11, and it can be found here. We will discuss problems like these during recitation, so come prepared to ask and answer questions.

For additional practice, try completing practice problem set #5 (with answers included at the end) and/or the non-assigned problems in Chapter 10 and Chapter 11. Answers to many of those problems are listed in the back of your textbook.

If you need assistance on these problems, you have several options. You can visit the AVID / Learning Success Center located above the MHCC library on the Mt. Hood Community College campus; they have tutors available to help you with your chemistry homework. You can also contact me if you have any questions.

This sample Quiz #5 (with answers at the end) which was given during a previous year's CH 222 class will help you understand the kind of questions that will be asked on the quiz.

You can also test your mastery of the subject matter by trying the self quiz for Chapter 11. This is an ungraded quiz that you can use to gauge your comfort level with these concepts.

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