CH116lecture9P

CH116lecture9P - UMass Boston, Chem 116 CHEM 116 Solutions...

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UMass Boston, Chem 116 ©H.Sev ian 1 CHEM 116 Solutions Lecture 9 Prof. Sevian FSG is Mondays 11:00 am and Tuesdays 3:30 pm both in S-1-89 Exam 1 is postponed to Thursday, October 2 Today’s agenda Note: If you printed out all of the lecture slides that were posted prior to last Thursday’s lecture, then you already have what is in today’s notes and you don’t need to print them again…. I have moved those pages from what is now posted as Lecture 8 and placed them instead in these Lecture 9 slides. So if you didn’t print Lecture 8 before, then print this Lecture 9 and bring it to class on 9/30/08. Today we will cover material from chapter 13. This material will not be on Exam 1. It will be on Exam 2. z Solutions: what they are composed of z Solubility and dissolving z
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UMass Boston, Chem 116 ©H.Sev ian 2 Complicated explanations th edition by Kotz / Treichel. C 2003. Reprinted with permission of Brooks/Cole, a division of Thomson Learning: www.thomsonrights.com . Fax 800-730-2215. Boiling points of some simple hydrogen compounds The extra credit is due at the beginning of class (2:00). Mixed intermolecular forces z Ion – dipole z The ion causes the dipoles to orient in ways that increase attractions z This explains solvation of an ionic compound in water or other polar solvents (e.g., Na + and Cl - ions in water) z Dipole – non-polar molecule z The dipole causes the non-polar molecules to form more temporary dipoles z This causes the non-polar molecules to orient in ways that increase attractions z This explains why it is possible to dissolve tiny amounts of non-polar chemicals in a polar solvent ( e.g.
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UMass Boston, Chem 116 ©H.Sev ian 3 About Exam 1 (Thurs Oct 2 in class) z Chapters 10 and 11 will be covered on Exam 1 z Please read the information about exams on the course website z Key points: z You will need a calculator – devices that are capable of communication (e.g.,PDA devices, cell phones, some graphing calculators) are not allowed z Bring a pencil and eraser z Scratch paper will be provided – you are not permitted to use your own z The exam starts at the beginning of class (2:00) and ends at the end of class (3:15) – please be on time so that you will have the complete time z Please sit every other seat in every other row Beginning chapter 13 now z From here forward, this material will not be on Exam 1 z Do not neglect the homework on chapter 13 in favor of studying for the exam z If you don’t do the chapter 13 homework, you will get behind z Doing the chapter 13 homework will help you solidify your
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This note was uploaded on 12/02/2011 for the course PHYSICS 235 taught by Professor Staff during the Fall '08 term at Rutgers.

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CH116lecture9P - UMass Boston, Chem 116 CHEM 116 Solutions...

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