literature discussions
I am teaching a one-semester inorganic course for Juniors and Seniors. This is the only inorganic course we have, except for an occasional advanced offering in organometallic chemistry.
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Atomic Emission Kit
Does anyone have any experience with the atomic emission kit that is available from Flynn Scientific? The set-up is a metal can that fits over a Bunsen burner. H2 gas is generated from Zn and HCl, which supposedly carries metal ions (Li+, Na+, etc.) up through the can and into the flame for easy viewing of the atomic emission spectra.
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Question about an observation in the laboratory
I have a question that perhaps someone will have an answer to-- in the lab last week I had students adding TiCl4 to water to show that it creates a very acidic solution and generates HCl gas. One thing that has always bothered me when I've done that reaction is that in addition to the expected white TiO2 precipitate, a bright yellow compound is also generated in many cases. Anyone have any idea what that could be? It has always stumped me...
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Avoiding the long afternoon
What are strategies you have/use to deal with/help students who all of a sudden (or slowly, gradually, all afternoon) find themselves with 30 minutes left in a lab period, with 2 hours of work left to do. How do you head this off, especially in a large lab section? How do you deal with it once its too late?
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Metals
Here are 2 demos that I do when I am talking about structures of metals and alloys:
The Atomic Trampoline Kit available from ICE: Guaranteed wow factor!
Memory Metal: I have a stash of 2" long wires so that I can give one to each student.
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Liquid oxygen
Has anybody ever done the liquid oxygen demo?
(to prove its paramagnetic and that simple Lewis structures don't accurately describe the bonding in O2?)
I'm doing it monday. wish me luck!
(to prove its paramagnetic and that simple Lewis structures don't accurately describe the bonding in O2?)
I'm doing it monday. wish me luck!
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