Never too old to learn! I want to go back for a chemistry degree too, but we'll see how that works out with my current job.
The Na + Cl demo is one of my favorites. I've had the ability to do it for forever but for whatever reason I never got around to it. I think it is THE
chemical reaction: combine a choking green gas that was used in chemical warfare with a metal that explodes when it gets wet, and you get table salt!
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