When brown iodine is exposed to starch it turns dark purple. In an experiment, you placed a cornstarch and glucose solution within a small plastic bag. Next, you placed the bag in a beaker with water and 10 drops of iodine. After 10 minutes, the solution in the bag turned dark purple and glucose could be found in the iodine water within the beaker. a. the plastic bag was permeable to cornstarch. b. the plastic bag was permeable to iodine.
c. the iodine moved into the plastic bag.
d. the cornstarch moved into the beaker.
e. the plastic bag was selectively permeable.

The following statements are correct:

The plastic bag was permeable to iodineThe iodine moved into the plastic bagThe plastic bag was selectively permeable

WHAT IS DIFFUSION AND OSMOSIS?

Diffusion is the movement of molecules/particles from a region of higher concentration to a region of lower concentration until there is even distribution. Osmosis is the process whereby water moves from a region of low concentration of solute to a region of higher concentration of solute through a semipermeable membrane. In this question, a cornstarch and glucose solution is placed within a small plastic bag, which is then placed in a beaker with water and 10 drops of iodine. It was observed that the bag turned dark purple and glucose could be found in the iodine water within the beaker.

This observation is due to all of the following reasons:

The plastic bag was permeable to iodine, hence, allowing it enter the bag. The iodine moved into the plastic bag via diffusion since the bag is permeable to it. The plastic bag was selectively permeable to both glucose and iodine.

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