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 iodine?(1 point)

Question

Responses

cornstarch
cornstarch

powdered sugar
powdered sugar

salt
salt

baking soda

Answer 1

The item listed that will have a chemical reaction with iodine is cornstarch. When iodine comes into contact with cornstarch, it produces a characteristic blue-black color due to the formation of a complex between iodine and the starch molecules. The other items listed (powdered sugar, salt, and baking soda) do not produce a similar color change with iodine.