In my second year of teaching chemistry I want to, as always, make my course increasingly engaging and participatory. We just dug into the periodic table and did the grueling “memory week:”
- memorize monovalent, binary, ionic compound names;
- memorize multivalent, binary, ionic compound names (using Stock system);
- memorize binary, nonionic compounds;
- memorize 22 polyatomic ions
Now I want to make a transition to DOING chemistry to use the breadth of their recently acquired knowledge in cool and meaningful ways. First stop: Check out the properties of ionic solutions. Not by definition, but my freaking cool demonstration: the Electric Pickle or, according to the jar label “Gherkin” Electrocution. (Hmmm is that too anthropomorphic?… I don’t mean it in that sense!)
Doesn’t it look great (above)! Probably need to insert the aluminum electrodes horizontally to get more of the length of the pickle glowing! Good; something to tinker with!