1. Monday, November 9 th Grab a blue sheet from on top of the projector. Take out: -16.1-16.5 packet -Review questions 1-17 -16.6-16.7 notes Write the chemical equation and the K a expression for the ionization the following acids in aqueous solution: o HBrO 2 o HC 3 H 5 O 2

2. Announcements Due Tomorrow, 11/10: Problem Set 1 Due Thursday 11/12: Le Chatelier’s Principle lab, Problem Sets 2 and 3, Effects of K a prelab (will be passed out tomorrow) Friday, 11/13: Quiz Due Monday, 11/16: 16.8-16.10 notes Due Tuesday, 11/17: Review questions 18-25, Problem set 4 Due Wednesday, 11/18: Problem set 5 Thursday, 11/19 (sorry about the typo): Chapter 16 test

3. Lactic acid (HC 3 H 5 O 2 ) has one acidic hydrogen. A 0.10 M solution of lactic acid has a pH of 2.44. Calculate the K a.

4. A 0.200M solution of a weak acid HA is 9.4% ionized. Using this information, calculate [H + ], [A - ], [HA], and K a for HA.

5. A particular sample of vinegar has a pH of 2.90. Assuming that acetic acid is the only acid the vinegar contains (K a = 1.8x10 -5 ), calculate the concentration of acetic acid in the vinegar.

6. The active ingredient in aspirin is acetylsalicylic acid (HC 9 H 7 O 4 ), a monoprotic acid with K a = 3.3 × 10 −4 at 25°C. What is the pH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 500. mg of acetylsalicylic acid each, in 250. mL of water?

7. Rest of Period Be productive! You have all of your directions and due dates Tomorrow: similar to today, but with bases – a few practice problems, and then time to work