What we've done so far:

Friday, December 2
Monday, December 5
Wednesday, December 7
Friday, December 9

Friday, December 4
The collision model works quite well for many different reactions. This idea of collisions between molecules can be combined with a known rate law to propose possible pathways for the reaction with a nanoscale view.  These step-by-step pathways are called  13.5 Reaction Mechanisms.

Each step in the pathway is called an elementary step:  remember that adding together all of the steps must give the overall balanced chemical equation.  Note that the overall balanced chemical equation shows what is happening on the macroscale.

Since an elementary step happens on the nanoscale, there is a distinct advantage. The rate law for an elementary step can be predicted based on the step itself.  We talked about the typical possible elementary steps in a pathway.The overall rate will be dependent on the rate determining step. Note that intermediates are formed and then consumed.
Read about how chemists deduce mechanisms through elegant experiments - bottom of page 564 and top of page 566.

SKILL: based on the rate law, is a given mechanism valid?
SKILL: draw reaction profiles.  Exercises: 51, 52, 54, 62

Clickers!  Click here for the document.

Monday, December 7
13.6 Catalysis allows a reaction to speed up by providing an alternative route that has a lower Ea
I drew you a diagram of what this looks like on the reaction coordinate diagram.

The catalyst takes part in the reaction but is not consumed based on the overall reaction.  It can either be inert or re-formed depending on the type of catalyst.

Additional Exercises: 70, 76, 86, 88, 94, 108, 110, 112.

A little review of MO theory...

Wednesday, December 9
No class

Friday, December 11
Review Class - click here for the clicker questions I covered...
Good luck on the final exam!