20071024 Day Lecture 20 Chapter 12

20071024 Day Lecture 20 Chapter 12 - Welcome to CHM...

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Unformatted text preview: Welcome to CHM 1220/1225 Please turn off cell phones pages iPods Thank you! Todays Plan Announcements Chapter 12 Concentration Colligative Properties Determining Molar Mass Pre-lecture Assignment 20 will be available at 2:00 p.m. today and is due by noon, Friday, October 26, 2007. Chapter 12 Quiz is due by noon, Monday, October 29, 2007. Chapter 12 Homework is due by 12:50 p.m. Monday, October 29, 2007 If you wish to request your exam be reviewed, please download the form from Blackboard (Course Documents/Exam Study Guides and Sample Exams) Staple the form to the front of your exam and submit it to Dr. Barber by 2:00 p.m. Friday, October 26, 2007. Chapter 12 Solutions Solution Formation 1. Types of Solutions 2. Solubility and the Solution Process 3. Effects of Temperature and Pressure on Solubility Solutions Colligative Properties 4. Ways of Expressing Concentration 5. Vapor Pressure of a Solution 6. Boiling-Point Elevation and Freezing-Point Depression 7. Osmosis 8. Colligative Properties of Ionic Solutions Colloid Formation 9. Colloids ? Helium-oxygen mixtures are sometimes used as the breathing gas in deep-sea diving. At sea level (where the pressure is 1.0 atm), the solubility of pure helium in blood is 0.94 g/mL. What is the solubility of pure helium at a depth of 1500 ft? Pressure increases by 1.0 atm for every 33 ft of depth, so at 1500 ft the pressure is 46 atm. (For a helium- oxygen mixture, the solubility of helium will depend on its initial partial pressure...
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20071024 Day Lecture 20 Chapter 12 - Welcome to CHM...

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