I want to introduce some Organic Chemistry. I’ll post resources in a separate article. The first lab is Density of Plastics. Here is another Density of Plastics lab with a different strategy to identify the Big Six Plastics. Here is a chart with their respective densities. Look at the bottom of plastic containers for the number. I need to collect several examples for this lab. The lab materials also require calcium chloride, sodium chloride, rubbing or isopropyl alcohol, vegetable oil, glycerin, popsicle sticks, and egg cartons. I am omitting glycerin because it’s too pricey. This is an appropriate lab for kids ten and older to try. Younger kids might need a lesson in Measuring Density by Displacement. Now I need to see which plastics I already have on hand.
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