Rxn Mechanisms

Good day. A few terms from the day:
reaction mechanism (series of simple chemical equations that can be added together (Hess's Law style) to produce the overall, observable reaction
elementary step (individual step of a mechanism, typically involves one or only a few molecules); molecularity identifies the number of reactant particles (1 = unimolecular, 2=bimolecular, 3=termolecular)
reaction intermediate - temporary product, product made in one elementary step and used up in subsequent elementary step
rate determining step - the slowest elementary step of a mechanism (not always the first of a mechanisms) - direct relationship with the rate law

The link below is another excellent little tutorial. Once again there are some practice questions (with answers).
http://www.wwnorton.com/college/chemistry/gilbert/tutorials/interface.asp?chapter=chapter_14&folder=mechanisms

or try the same link with a slightly different url
http://www.wwnorton.com/college/chemistry/gilbert/tutorials/interface.swf?chapter=chapter_14&folder=mechanisms

I hope that you take the 5 or 10 minutes to look at the link. I thought that there were some great little gems tucked away in that puppy.

Next up:
-review for test
-reaction mechanisms lab (bring a timing device)

A few leftover mole day jokes: Why did the mole cross the road? [Because the chicken was busy.] Why are moles bad at counting? [Because they only know one number.] Why are moles always on their cell phone? [Because they love moleble devices.] Can you tell which one I made up myself?