1. To Do… OWL Lectures Discussion
Chapter 12 (Part 2) due Friday, April 20
Chapter 14 due Tuesday, April 24
Lectures
Begin reading Chapter 14
Discussion
Chapter 14 text homework

2. Exam 3
Thursday, April 26, 7:00 pm–8:30 pm; Rooms on the website (same).
Conflict: April 26; 5:00 pm – 6:30 pm in 1022 Lincoln Hall; sign up in 1026 CA
Practice exam will be posted online.
See me right away if you have a conflict with the exam and conflict times.

3. Lewis Structures
Determine the total number of valence electrons in the molecule.
Form at least one bond between atoms in the molecule (a pair of electrons is a bond)
Arrange the rest of the electrons (in pairs) to satisfy the octet rule or duet rule (for hydrogen).
Watch for exceptions.

4. Clicker Question
Which of the following has a Lewis structure most like that of the nitrate ion?
a) the carbonate ion
b) the sulfate ion
c) ozone (O3)
d) nitrogen monoxide
e) I am not sure.

6. VSEPR – General Rules Draw the Lewis structure.
If the octet rule is exceeded, add electrons to the central atom.
Multiple bonds count as one direction (or one “effective pair”).
Consider the lone pairs when determining the geometry.
Consider only the atoms when determining the shape.
Polarity comes from asymmetry.

7. Table 12-4 p295

8. See pages 63-64 in your lab book

9. See pages 63-64 in your lab book