powerpoints and sites to help
AP students, do visit http://www.tvgreen.com and click on AP. There you'll find powerpoints that correspond to each of the chapters in the Zumdahl text. They can be helpful.
Another location is http://www.utmem.edu/physpharm/.009.html
I also visited http://www.sparknotes.com/chemistry/solutions/colligative/section1.html as well as http://members.aol.com/profchm/raoult.html
The test over chapters 11 and 13 will be on Wednesday, October 22