Is the bag or beaker more concentrated in starch?
Answer (3)
I'm assuming this is from a diffusion lab? I did one a little while back, which may or may not be the same. However, we found that the baggie was more concentrated in starch and the beaker was more concentrated in iodine.
The bag is more concentrated in starch than the beaker. This is because the bag contains a solution of starch and water , while the beaker contains only water.
The starch molecules are unable to pass through the plastic bag, so they remain concentrated in the bag. The water molecules , however, are able to pass through the bag, so they diffuse into the beaker, making the solution in the beaker less concentrated in starch.
If you were to leave the bag and beaker for a long enough period of time, all of the starch molecules would eventually diffuse into the beaker, and the **concentration **of starch in both the bag and beaker would be the same. However, in practice, this would take a very long time, as the rate of diffusion is relatively slow.
To know more about starch:
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The bag is more concentrated in starch than the beaker because the bag contains a starch solution, while the beaker contains only water. Starch molecules cannot move through the bag, but water does, leading to a higher concentration of starch in the bag. If left long enough, starch may diffuse into the beaker, but this takes considerable time.
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