If there are loads of labs with sugar, are there labs with salt? Yes, there are! Let’s start with a bit of background, Shaking Out the Facts about Salt! This is another Chemmatters magazine article for teens. First, grow salt crystals with table salt and Epsom salts. If you can find alum, it makes excellent crystals. Here is a wiki how with detailed instructions. Try both iodized and natural salts.
Try this lab, Solubility of a Salt. Teens will have another opportunity to graph, either by hand or with a spreadsheet. Here are several Salt experiments to try. One more topic: Salting Roads! This is another Chemmatters article to give teens a bit of background about freezing point depression. Winter is the right time to Melt Ice with Salt! Use any salt you have on hand: Epsom salt, Kosher salt, table salt, Driveway Heat, (calcium chloride), etc. Bag a lot of ice cubes. Use the same masses of ice and salt for each trial. Which salt works best to melt ice? I didn’t locate as many salt ideas as sugar. Salt is another cheap, household substance to use for another round of substantive labs.
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