Writeup pet peeves

Submitted by Adam Johnson / Harvey Mudd College on Thu, 05/15/2008 - 14:09

I thought it would be fun to prepare a list of pet-peeves for lab writeups to include in my lab manual after grading this last batch of lab reports. I figured, "tell them what you want" up front.  I do that, but some of these get missed, since they are more "tell them what you DON'T want."  So, here is my preliminary list.  Very tongue in cheek.  Not sure if I would edit them before putting them in the lab manual or not.  Probably not much.  Keep it light.  Thanks to Scott for the last one.

Does anybody want to add to the list or share their own?

 

 

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Pretest or HW assignment for Review of General Chemistry topics in Inorganic Chemistry

Submitted by Kurt Birdwhistell / Loyola University New Orleans on Mon, 05/05/2008 - 14:51


Hi everyone,
 Someone at the recent ACS meeting mentioned an initial HW assignment
that they give their students in Inorganic chemistry to keep from
reviewing several of the inorganic topics from general chemistry.  
I think
this would be a useful object for this website. 

Does anyone have something like that already started or completed?

 

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Best demo you do in inorganic?

Submitted by Maggie Geselbracht / Reed College on Fri, 05/02/2008 - 02:50

I am curious what are the 1 or 2 best, must-do demos that you do when you teach inorganic chemistry?  My students love demos, but they do take a lot of effort to plan for ahead of time, set up, and then clean up and dispose of afterwards.  The "culture of the last minute" is my typical M.O., so I tend to only do the tried and true demos that work and are both impressive and educational.

Here are my 3 that I always do in my sophomore level inorganic course:

1. Liquid oxygen

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Lab Cleanliness ... not

Submitted by Adam Johnson / Harvey Mudd College on Tue, 04/15/2008 - 00:06

We have a completely open and shared upper level laboratory.  We teach 2 courses per semester in the laboratory, sometimes, but not usually, with 2 classes in there at once (organic, 2 semesters, analytical in the fall and inorganic in the spring).  The students spread throughout the lab, with mostly shared glassware, chemicals, etc.  Needless to say, it can get ugly in there.

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I never know what to cover about the f-block?

Submitted by Maggie Geselbracht / Reed College on Fri, 04/11/2008 - 23:04
I will admit that f-block chemistry is one of my real weaknesses.  Aside from the lanthanide contraction and the electron configurations of Eu2+/Eu3+, I never quite know what to cover...which means that I leave out the topic in an otherwise very full semester.  I would be interested to hear what other people teach about the f-block and how much time they devote in a typical one-semester course.
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Atomic Emission Kit

Submitted by Maggie Geselbracht / Reed College on Mon, 04/07/2008 - 17:24

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

Submitted by Hilary Eppley / DePauw University on Sat, 04/05/2008 - 17:02
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

Submitted by Adam Johnson / Harvey Mudd College on Sat, 03/08/2008 - 11:00

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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