1. Announcements
No discussion on Friday! Bring workshop assignment to the following lab.
There is discussion the Monday following break!
Practice Exams + Study Guide are on the website!
Exam 3 is on Thursday December 5!

2. Key Vocabulary Molecular Terminology Molecular Polarity Exceptions!
Intermolecular Forces
Dispersion Forces (All Lewis Structures)
Dipole-Dipole Forces (Polar Lewis Structures)
Hydrogen Bonding (H-F, H-O, H- N in Lewis Structure)

3. Clicker #1
The correct Lewis structure for IF3 has ____ lone pairs around the central atom.
a) 0
b) 1
c) 2
d) 3
e) 4

4. Clicker #2 a) 1 & 2 b) 1 & 3 c) 1 & 4 d) 1 & 5 e) 1 & 6
Where would it be best to place the chlorine atoms in SF4Cl2 to make this a nonpolar molecule?
a) 1 & 2
b) 1 & 3
c) 1 & 4
d) 1 & 5
e) 1 & 6

5. Clicker #3: Check in from Tuesday
The molecules KrCl2 and KrF2 have…
The same geometry, same shape, and are both polar.
The same geometry, same shape, and are both nonpolar.
The same geometry, different shape, and are both polar.
The same geometry, different shape, and are both nonpolar.
Different geometries, different shapes, and are both polar.

6. Oil Structure vs. Water Structure
Nonpolar
Polar

7. Clicker #4: Will CH3OCH3 dissolve in water?
No, because it is nonpolar.
Yes, because it has a dipole moment pointing towards the carbons.
Yes, because it has a dipole moment pointing towards the oxygen.

8. Question
Which of the following has the strongest intermolecular forces?
1) Cl2
2) Br2
3) I2
4) All of the above have the same amount of intermolecular forces.

9. Question
Which of the following has the strongest intermolecular forces?
1) H2O
2) SF6
3) Both have the same amount of intermolecular forces.

10. Clicker #5
How many of the following interactions does CH3CH2OH exhibit?
London dispersion
dipole-dipole
hydrogen bonding
A) 0
B) 1
C) 2
D) 3

11. Clicker #6
How many of the following interactions does CH3OCH3 exhibit?
London dispersion
dipole-dipole
hydrogen bonding
A) 0
B) 1
C) 2
D) 3

12. Clicker #7
Choose the molecule with the highest boiling point. (Hint: Is each polar or nonpolar?)
a) SeO3
b) SeO2
c) H2