a chemistry class is experimenting with iodine to see which common white powder items will react and make the iodine change color. which item listed will have a chemical reaction with the iodine?

Question

baking soda
powdered sugar
salt
cornstarch

Answer 1

Iodine typically reacts with starch, resulting in a blue-black color change. Among the items listed, cornstarch is the only one that contains starch and will react with iodine to produce a color change. The other items—baking soda, powdered sugar, and salt—do not react with iodine in the same way.

So, the answer is:

• Cornstarch will have a chemical reaction with iodine, causing a color change.