Schedule1 Schedule2 Schedule3 Schedule4
Schedule to Exam 2
| Date | Day | Topics |
|---|---|---|
| 9/18 | Fri | Go over Exam 1. Continued with Chapter 13 - when over ionic vs covalent compounds. Writing electron dot formulas for the representative elements (symbols with dots around them). |
| 9/21 | Mon | Polar vs Non-polar bonds. I discussed how a PARTIAL charge develops in a molecule. Any partial (-) charge must be accompanied by a partial (+) charge. Dipole moments are measured and the units are debye units. Electronegativity (EN) is a scale from 0 to 4.0 and relates to electron affinity. Know the periodic trend for EN. |
| 9/22 | Tue | |
| 9/23 | Wed | more on bonding. Writing e- dot formulas. The octet rule. Showed the first 10 alkanes (hydrocarbons). |
| 9/24 | Thu | |
| 9/25 | Fri |
More on writing electron dot structures. How most all the 2nd row elements
obey the octet rule. Organic chemistry structures and the "looks" of certain
elements (C, N, O, F, Br, Cl, I, and H) in an electron dot/line structure.
Introduced and defined formal charge. "Best" structure minimizes formal
charge. Showed the e- dot structure for carbonate. Drew 3 equivalent structures
and put doubleheaded arrows between them. Defined and explained RESONANCE
structures. Defined Bond Order. Carbonate's C-O bonds have bond orders of
1.33. Drew a "hybrid" structure for carbonate. Also defined and explained
the concept of delocalization of electrons. Talked a little about upcoming
molecular orbitals where the electrons are delocalized around several atoms.
Homework 4 due by 11:30 PM |
| 9/28 | Mon | Exceptions to the octet rule (over and under). More on resonance. Worked many examples exceeding octet rule - also calculated formal charge on these structures. |
| 9/29 | Tue | |
| 9/30 | Wed | Start Section 13.13 on VSEPR theory and
molecular geometries.
Introduce Valence Bond (VB) or Localized Electron (LE) theory (Chapter 14).
Hybridizing
atomic orbitals to get the shapes (geometries) we need.
Homework 5 due by 11:30 PM |
| 10/1 | Thu | |
| 10/2 | Fri | ????? |
| 10/5 | Mon | Finish molecular geometries and start Molecular Orbital Theory. |
| 10/6 | Tue | |
| 10/7 | Wed | Finish up molecular orbital theory. |
| 10/8 | Thu | |
| 10/9 | Fri | day |
| 10/12 | Mon | day |
| 10/13 | Tue | |
| 10/14 | Wed | day |
| 10/15 | Thu | EXAM 2 : 7-9 PM |