A whole antacid tablet and a crushed tablet are added to separate beakers of water so that their relative reaction rates can be compared. Follow link here for exp: http://www.reachoutmichigan.org/funexperiments/agesubject/lessons/other/antacid.html
For AP Chemistry: High school students learn how common pop-culture references, specifically Harry Potter books, can relate to such core chemistry concepts as reaction rates and thermodynamics by making and demonstrating their own “magic wands” (sparklers).
About Crash Course! Six awesome courses in one awesome channel: John Green teaches you US History and Hank Green teaches you Chemistry. Check out the playlists for past courses in World History, Biology, Literature, and Ecology.