These are pictures from the powdered solid analysis. What you see are 11 of the 13 possibilities that I actually had around my house, even acetic acid (being a bread baker.) Sand (go figure) and sodium acetate were the only two I did not have.
Other things you need are Lugol's iodine (not alcohol-based like the stuff at the pharmacy) hydrochloric acid (HCl), and pH paper, all available along with acetic acid from Home Training Tools. They include instructions to make a 3M HCl solution. You may want to get a brown glass bottle to store it in as well, and a 10 ml graduated cylinder to measure it out (though not necessary.)
The coolest reaction: vitamin C (acetic acid) turns iodine from brown to completely clear.
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