I like the sodium acetate crystallization from Dr. Shakhashiri’s Chemical Demonstrations. I prepare the supersaturated solution ahead of time, then seed it with crystals during class. It’s fast, simple, entertaining, and the flask gets warm, showing that heat is being released by the reaction. Here’s the link: http://lecturedemos.chem.umass.edu/solutions13_3.html.
From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of David Schuller Sent: Thursday, January 08, 2015 1:02 PM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] Demonstration for 2nd graders? This one is probably above second grade, but the equipment setup is pretty easy http://ipl.physics.harvard.edu/wp-uploads/2013/03/15c_s07_5.pdf Measuring the wavelength of light with a ruler On 01/08/15 13:35, John Lee wrote: Hi everyone, Slightly off topic here but I got myself volunteered by my 2nd grade son to do a show and tell at his class. I have the rock candy experiment ready with some background info on what I do. Can anyone direct me to some resources or your personal demo's that you have done? Thanks a bunch -John -- ======================================================================= All Things Serve the Beam ======================================================================= David J. Schuller modern man in a post-modern world MacCHESS, Cornell University schul...@cornell.edu<mailto:schul...@cornell.edu>
