a chemistry class is experimenting with iodine To see which common white powder items will react and make the iodine change colors which item listed will have a chemical reaction with IO D cornstarch salt powdered sugar or baking soda
Out of the items listed, the cornstarch and powdered sugar are unlikely to have a chemical reaction with iodine.
However, both salt and baking soda can react with iodine and cause a color change. When iodine comes into contact with salt or baking soda, it can form a complex called triiodide ion, which has a characteristic brown color. So, both salt and baking soda can potentially cause the iodine to change colors.