The point today is to be able to identify bio molecules: sugars, starches, lipids, and proteins. I also wanted the kids to understand iodine is a test for starch, biuret for protein, and Benedict’s for sugars. The kids used these instructions and this website to test a bunch of foods: corn starch, corn sugar, corn syrup, vegetable oil, agar, gelatin, potato chips, beans, peanuts, etc. (No one had a peanut allergy.) The kids used Benedict’s solution, blurted solution, iodine, and Sudan III. The kids used brown lunch bags to do additional fat tests. It was a bit chaotic. A few teens struggle with less structured labs. It was a chance to show kids how to use Easy temp with aTI 84 graphing calculator. The Benedict’s solution test requires a hot water bath with a temperature of 70 degrees to 95 degrees Celsius. The steel temperature probe connects directly to a TI 84 calculator—not a TI 83. Most TI 84 calculators have Easy Data software preloaded on the calculator. Take a look.
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