A chemistry 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 iodine

Answer 1

Iodine can react with certain substances to produce a color change, typically turning blue or dark brown in the presence of starch. In your experiment, common white powder items that may react with iodine include:

1. Starch - If you have a starch powder (like cornstarch), it will react with iodine and turn blue.
2. Baking soda (sodium bicarbonate) - It generally does not react with iodine to produce a color change.
3. Baking powder - Similar to baking soda, it does not react with iodine to change color.
4. Flour (wheat flour) - While it may not produce a strong color change like starch, it can have some reaction with iodine due to the presence of starch in flour, potentially resulting in a faint color change.

Among these, pure starch is the most likely to produce a noticeable reaction with iodine, resulting in a deep blue color.