Homework for Tuesday:  Many of you did not get the assignment for Monday so make sure you get it completed. I will collect these on Wed.
3rd Hour will do lab, so have the review questions answered (typed) p208 of lab handout.
5th hour type "review questions" and "questions" from lab for tomorrow.  I will collect two things from you tomorrow.
1. questions 2-52 even
2. 58-70 even problems
I will collect the questions along with the lab report on Monday.
Homework for Monday:  Read about Colligative Properties Section 13.5.  Answer Even only numbers 58-70.  On 70 just do a and b.

Know what Raoult's law means.  It is really just a proportion.  It you have 100% water at 20C is has a vapor pressure of 17.5 torr.  If you dissolve a nonvolatile solute in it you lower the vapor pressure, diagram to of p. 547.  If you added 360g of glucose (2moles) to 144g of water(8moles) the mole fraction of water would be .8moles of water to 10 moles of solution.

If 100% water has a vapor pressure of 17.5 torr than an 80% solution would only have a vapor pressure of 14 torrs.

Remember we are discussing a nonvolatile, non electrolyte like sugar.  If you added salt even if it was 2 moles the mole fraction of water would go down to 2.8.  (8moles water/(2moles salt x 2) + 8 moles water =.66moles

If 100% water has a vapor pressure or 17.5 than a 66.6% solution has a vapor pressure of 11.7 torrs.

Know what an ideal solution is, and in number 60 explain why the solution is not ideal.

Have a clear picture of osmotic pressure and the colligative effect upon it.

Why does adding alcohol to water not decrease the vapor pressure of change the boiling point.  Remember fractional distillation.