I keep running across interesting labs for Chemistry. Let me share a few regarding electrolysis. First is Exploratorium’s Electrolysis of Water, separating water into hydrogen and oxygen gas, a decomposition reaction. Here is the same lab with pencils or thumbtacks or refillable pencil lead. See? This lab has the makings of another inquiry-based lab. Which type of electrode works best? Does the type of indicator matter?
Another interesting lab is Tin Dendrites. (Good Will frequently has kits. Stannous chloride or tin II chloride is pricey.) If you can find tin II chloride reasonably, try this Flinn version Petri Dish Electrolysis. Finally, Electrochemical Cells measures the reduction potential for several metals. This Electrochemistry lab is similar. I seldom get to Electrochemistry in General Chemistry. But if you do, go for it and try a few labs!
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