# Announcements LonCapa Homework Due Wednesday at 10 00

- Slides: 13

Announcements Lon-Capa Homework Due Wednesday at 10: 00 pm No discussion on Friday! Bring workshop assignment to the following lab. There is discussion the Monday following break! Exam 3 is on Thursday December 5!

Key Vocabulary Molecular Terminology • Electronegativity • Polarity/Dipole • Lewis Structures (each bond is 2 electrons) • VSEPR • Exceptions!

Clicker #2 Draw the Lewis structure for PCl 3. What are the geometry, shape, and bond angles of this molecule? Geometry Shape Bond Angles a) Trigonal planar 120° b) Tetrahedral 109. 5° c) Tetrahedral Trigonal pyramid 107° d) Trigonal pyramid 107° e) Tetrahedral Trigonal planar 120°

PCl 3

Clicker #3 Draw the Lewis structure for SO 3. What are the geometry, shape, and bond angles of this molecule? Geometry Shape Bond Angles a) Trigonal planar 120° b) Tetrahedral 109. 5° c) Tetrahedral Trigonal pyramid 107° d) Trigonal pyramid 107° e) Tetrahedral Trigonal planar 120°

SO 3

Polar vs. Nonpolar Molecules CO 2 HCN CH 4 CH 2 F 2

Clicker #4 Draw the Lewis structure for CH 4. What are the geometry, shape, bond angles, and polarity of this molecule? Geometry Shape Bond Angles Polar? a) Tetrahedral 109. 5° Polar b) Tetrahedral 109. 5° Nonpolar c) Tetrahedral Trigonal pyramid 107° Polar d) Trigonal pyramid 107° Nonpolar

Clicker #5 Draw the Lewis structure for CH 3 F. What are the geometry, shape, bond angles, and polarity of this molecule? Geometry Shape Bond Angles Polar? a) Tetrahedral 109. 5° Polar b) Tetrahedral 109. 5° Nonpolar c) Tetrahedral Trigonal pyramid 107° Polar d) Trigonal pyramid 107° Nonpolar

Clicker #6 The correct Lewis structure for IF 3 has ____ lone pairs around the central atom. a) 0 b) 1 c) 2 d) 3 e) 4

Clicker #7 Where would it be best to place the chlorine atoms in SF 4 Cl 2 to make this a nonpolar molecule? a) 1 & 2 b) 1 & 3 c) 1 & 4 d) 1 & 5 e) 1 & 6

Clicker #8 What are the bond angles around the carbon and oxygen atoms in CH 3 OH? Carbon Oxygen a) 90 180 b) 90 107 c) 109. 5 180 d) 109. 5 104. 5 e) 120