BCCE W40:. Developing Demonstrations for the Classroom and the JCE Tested Demonstrations Feature. Bill Deese Todd Silverstein Ed Vitz. Ed Vitz. http://faculty.kutztown.edu/vitz/. Tested Demos Home Page: http://faculty.kutztown.edu/vitz/TD/TDhome.html. JCE Information for Authors.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Developing Demonstrations for the Classroom and the JCE Tested Demonstrations Feature
Bill DeeseTodd SilversteinEd Vitz
Tested Demos Home Page:
JCE Information for Authors
Magic Sand/JCE 2000-2002 issues/goldenrod
JCE Software Door prize
Recent issues of JCE, JCE pencils, etc.
Volunteers for TD checkers??
Department of Chemistry,
Louisiana Tech University,
Ruston, LA 71272
Phone: (318) 257-4878
Fax: (318) [email protected]
http://www.chem.LaTech.edu/(University Front Page!!??)
Ph. D., University of Arkansas, 1981.
B. S., University of Central University , 1976.
Areas of Interest
Synthesis and characterization of bimetallic complexes containing platinum(II).
Chemical Education; Serious Juggling; Chemistry on TV
BA., Brandeis University; M.S., Ph.D., UC Berkeley.
Phone: 503-375-5359 email: [email protected]
Chem. 115 Introductory Chemistry I
Chem. 116 Introductory Chemistry II
Chem. 351 Biochemistry
Chem. 430 Advanced Topics in Biochemistry
Professional Interests: Biological membranes and bioenergetics; excitable membranes and energy transduction; neurochemistry; sensory transduction, and hormone signalling.
Interests: I am a folk musician (tinwhistle, bouzouki, guitar, mandolin, sax), dance caller (contras and squares), singer and dancer; I bicycle as well.
Silverstein, Todd P. Equilibrium: A Teaching/Learning Activity J. Chem. Educ. 2000 77 1410
Silverstein, Todd P. Graphing Calculator Strategies for Solving Chemical Equilibrium Problems (re J. Chem. Educ. 1999, 76, 632-634) J. Chem. Educ. 2000 77 1120
Silverstein, Todd P. Weak vs Strong Acids and Bases: The Football Analogy J. Chem. Educ. 2000 77 849
Silverstein, Todd P. Principles of Physical Biochemistry (by Kersal E. van Holde, W. Curtis Johnson, P. Shing Ho) J. Chem. Educ. 1999 76 474
Silverstein, Todd P. The "Big Dog-Puppy Dog" Analogy for Resonance J. Chem. Educ. 1999 76 206
The ACS Style guide: A Manual for Authors and Editors, 2nd Ed., ed. Janet S. Dodd, American Chemical Society, 1997.
ISBN 0-8412-3462-0 pbk
Chapter 10: Peer Review
Appendix III: Ethical Guidelines to Publication of Chemical Research
ACS Style Guide p. 305:
1. Is It New
2. Is It True
Allen J. Bard
The University of Texas at Austin
Immediate Past Editor, Journal of the American Chemical Society
And we’ll add
3. Is it Safe to Do?
No danger to audience or demonstrator (consult and quote the MSDS*)
Prescribe safe disposal. Consult Flinn catalog or MSDS.
Demonstrators should follow DIVCHED “Minimum Safety Guidelines for Chemical Demonstrations” and other safety references.
Demonstrations can be an excellent mechanism for improving safety by teaching safe procedures, by making dangerous properties known and by showing how to avoid the danger.
We will not ban phenolphthalein or Yamada’s Universal indicator (which contains phenolphthalein) because of its recent addition to EPA carcinogen list, but we will note that status and publish safe handling and disposal procedures.
Search the JCE Index for Primogenitors
Search as many published demonstration books as possible http://faculty.kutztown.edu/vitz/TD/TDhome.html
Novel presentations of well-known phenomena are great, but new demonstrations must be significantly different from previous ones if they exist.
• Tested Demonstrations must work as published with very little “tweaking”.
• Checkers actually do them.
• The chemistry is in the explanation and the chemistry must be correct (but keep it brief): Nick Downes
PV = nRT
With apologies to
Nick Downes, “Big Science,” AAAS Press, 1992, p10.
The Ferrioxalate Actinometer, JCE 58, 655 (1981)
If we did not know the formulas…the chemistry...for the photochemical reaction, we wouldn’t know that it contained a component of spinach or rhubarb which is toxic. A fatal dose of oxalate is 1500 mg, and spinach has 600 mg/100 g, peanuts 150 mg/100 g, rhubarb 500 mg/100g (much higher in leaves), and a cup of tea 50 mg.*
Oxalic acid in rhubarb can be used to clean aluminum pans because it bonds to Al even better than it bonds to Fe…. For best flavor, rhubarb should not be cooked in aluminum pans…
Oxalic acid is used in radiator shops and in heavy duty cooling system cleaners…Why?
Spinach, which has a high iron and calcium content, is a lousy source of dietary iron and calcium… Why?
*Emsley, J. “Molecules at an Exhibition,” Oxford U. Press, 1998
Oxalic acid toxicity is due to lowering the blood Ca2+ level, because it bonds to Ca2+ more strongly than to Al or Fe!
But not all the calcium oxalate is excreted…some may remain in the body and accumulate in the bladder and kidneys as “kidney stones.”
Surplus Vitamin C is metabolized to oxalic acid in the body and huge does may lead to … kidney stones.
Antifreeze (ethylene glycol) is metabolized to oxalic acid, and that’s what accounts for it’s notorious toxicity to animals, which drink it because it tastes sweet.
Carl Wilhelm Scheele detected oxalic acid in rhubarb in 1784.
Janet Marie Gidley
Bill Deese demonstrating the effects of molecular motion and convection
John Olson demonstrating the effects of magnetic ink used in US currency.
Joe Schmuckler describing his group’s research on the pedagogical efficacy of demonstrations.
Martin Bartholow describing his water manometer and its use to teach gas laws.
Phil Reedy (right) with volunteers about to demonstrate the simultaneous explosion of multiple Pringles cans effect
Sami Ibrahim demonstrating chromatography and detection of Fe, Ni, Co ions
Todd Silverstein demonstrating the effects of polarity of liquids on their behavior