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)
Responses
cornstarch
cornstarch
salt
salt
baking soda
baking soda
powdered sugar
None of the listed items will have a chemical reaction with iodine.
To determine which common white powder items will react and make iodine change color, you need to look for substances that undergo a chemical reaction with iodine. From the options given, the item that will have a chemical reaction with iodine is:
- Baking soda.
Cornstarch, salt, and powdered sugar are not expected to have a chemical reaction with iodine.
To determine which item will have a chemical reaction with iodine, we need to understand what iodine reacts with. Iodine is known to react with certain reducing agents, which are substances that can donate electrons to another substance. In this case, we are looking for a white powder item that is a reducing agent and can react with iodine.
Let's analyze each item listed:
1. Cornstarch: Cornstarch is not a reducing agent. It is a starch derived from corn and does not have the ability to donate electrons to iodine. Therefore, it will not have a chemical reaction with iodine.
2. Salt: Salt, or sodium chloride (NaCl), is not a reducing agent. It is an ionic compound composed of sodium and chloride ions, which do not have the ability to donate electrons to iodine. Therefore, it will not have a chemical reaction with iodine.
3. Baking soda: Baking soda, or sodium bicarbonate (NaHCO3), is a reducing agent. It contains a hydrogen atom that can donate an electron to iodine, resulting in a chemical reaction. Therefore, baking soda will react with iodine and cause a color change.
4. Powdered sugar: Powdered sugar, or confectioner's sugar, is not a reducing agent. It is composed of finely ground sugar particles and does not have any components that can donate electrons to iodine. Therefore, it will not have a chemical reaction with iodine.
Based on this analysis, the item that will have a chemical reaction with iodine is baking soda.