how can we find that the salt has iodine
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Using a permanent marker, label one of the 10 ounce (or larger) plastic cups "Iodine."
Pour 120 milliters (mL) (1/2 cup [C.]) of distilled water into the labeled cup.Add 2.5 mL (1/2 teaspoon [tsp.]) of laundry starch solution.
Add five drops of iodine antiseptic solution and stir well with a clean, disposable plastic spoon. You should see the iodine turn a blue-purple color as it interacts with the starch solution,
Pour 120 milliters (mL) (1/2 cup [C.]) of distilled water into the labeled cup.Add 2.5 mL (1/2 teaspoon [tsp.]) of laundry starch solution.
Add five drops of iodine antiseptic solution and stir well with a clean, disposable plastic spoon. You should see the iodine turn a blue-purple color as it interacts with the starch solution,
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