The concentrations of solutions can be expressed in many units, such as %, ppm, mol/L, and karats.  Text reference is p.302-312.
Homework:  p.305-312 #1b, 2, 5c, 7, 10, 11, 15a, 18

Water is a polar molecule, so it dissolves solutes that are polar, like it is.  Non-polar solvents like oil dissolve non-polar solutes.  Read p.291-294 and record two important ideas from each page. 
Homework:  1st side of handout; p.289 #9; p.301 #2, 4, 5, 8

Test day.  Be sure to complete the homework from yesterday before you come to class tomorrow.

Read p.283-288 and note definitions of bold words if you were absent.  Do the "Thought Lab" on p.288.
Homework:  p.289 #10, 11, 12ac.

Class time was spent on review of Unit 3:  Chemical Reaction Calculations.  Review questions are found on the posting for 04/21/2010.

Lead(II) nitrate reacts with potassium iodide to form a yellow precipitate.  Students are to find the limiting reactant and the percentage yield of the precipitate.  The report is due Monday, April 26.  The Unit Test in on Tuesday, April 27.

Actual, theoretical, and percentage yield all represent the amount of product in a chemical reaction.  Read p.260-264 in the text for help. 
Homework:  p.262 #31, 32; p.264 #36

The unit test is on Tuesday, April 27.  Review questions include:  p.30 #7-9; p.170 #2; p.193 #3, 7, 13de, 14ac, 17ce, 22, 31; p.229-231 #5, 7b, 8, 11, 14, 14, 19, 20, 25, 29; p.271-273 #5, 6, 9, 13, 15

Read the text, p.251-257, including example problems.
Homework:  p.254 #23-25; p.258 #30ac; p259 #7

You usually have more of at least one ingredient in your house than is needed to make a recipe.  This ingredient is in excess.  Sometimes you barely have enough of an ingredient to make a recipe.  This ingredient is your limiting ingredient because it limits the amount you can make.  Consult the text p.251-252, and if you were absent today, do the "ThoughtLab" on p.252.  Answer the questions on the handout.  Answers are in brackets.

Read p.241-248.  Answer p.244 #11; p.246 #16, 17; p.250 #4