Reflections on a (Virtual) Guest Speaker Visit to my Chemistry Class
I've mentioned previously that my current grade 10 class is reading "The Case of the Frozen Addicts" together. As my students starting writing their blogs to respond to the reading, I saw quite a few questions that I couldn't answer. But I didn't want to leave the questions there with no response, so I went to Twitter to find scientists to join my class as a guest speaker.
JCE 90.12—December 2013 Issue Highlights
Changing the Landscape of Chemical Education The December 2013 issue of the Journal of Chemical Education is available online to subscribers at http://pubs.acs.org/toc/jceda8/90/12. This issue of JCE plus the content of all past issues, volumes 1 through 90, are available to subscribers at http://pubs.acs.org/jchemeduc.
Osmotic Pressure, Hydrostatic Pressure
Osmosis of a sucrose solution through a semi-permeable dialysis membrane bag is demonstrated.
Crystallization of Supersaturated Sodium Acetate - Application
A chemical hot pack uses the crystallization of sodium acetate to provide a portable heat source.
Canned Heat
Liquid ethanol is poured into a saturated calcium acetate solution and a solid gel is formed. The gel burns like canned heat (Sterno™).
Ferrimagnetism - Part 1 of 2 - Hematite and Magnetite
Hematite and magnetite are formed from iron(II) and iron(III) solutions.
Ferrimagnetism - Part 2 of 2 - Testing for Magnetism
Hematite and magnetite samples are tested for magnetism.
Ring Strain - Historical Note
This is a simulation of how the reaction of iodine with α-pinene was used as a form of antisepsis.
Ferrofluid - Demonstration
Spikes in aqueous ferrofluid are formed in response to a magnet.
Reaction of magnesium with carbon dioxide
The reaction of magnesium with carbon dioxide (dry ice) is demonstrated. Despite the absence of air, the magnesium continues to glow.