a chemistry class is experimenting with iodine to see which common common white powder items will react and make the iodine change color which item listed will have a chemical reaction with iodine. Would it be powdered sugar, cornstarch, salt, or baking so

Answer 1

In this experiment, of the common white powder items listed, cornstarch will react with iodine and produce a color change. When iodine comes into contact with starch, it forms a blue-black complex.

• Powdered sugar (sucrose) does not react with iodine.
• Salt (sodium chloride) does not react with iodine.
• Baking soda (sodium bicarbonate) also does not react with iodine in a way that produces a color change.

So, the item that will change color when reacting with iodine is cornstarch.