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

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.

Review Sessions Monday, April 23 Tuesday, April 24 1002 Lincoln Hall and 1066 Lincoln Hall 6:00-8:00 pm Tuesday, April 24 165 Noyes Lab 7:00-9:00 pm

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.

Table 12-4 p295

See pages 63-64 in your lab book

See pages 63-64 in your lab book

Clicker Question How many of the following molecules can correctly be described as “bent”? O3 H2S SeO2 CO2 XeCl2 a) 1 d) 4 b) 2 e) 5 c) 3

Figure 12.5 Figure 12-5a p273

Clicker Question How many of the following molecules are polar? I. CO2 II. CCl4 III. XeF4 IV. SF4 a) 0 b) 1 c) 2 d) 3 e) 4