We did an osmosis experiment where we put a dialysis bag, Ask an Expert

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We did an osmosis experiment where we put a dialysis bag containing a solution of starch + sugar in a beaker containing water + iodine.

After 90 minutes, the color inside the tube went from white to grayish blue (iodine moved in).

After 90 minutes the color of the water didn't change - remained yellow.

There was a trace of glucose in the water at the end of the experiment, and the dialysis tube seemed to "puff out" - like water had entered it..

a. Why did the color inside the dialysis tube change?
b. Why did some of the glucose leave the dialysis bag?
c. Why didn't the water change color?
d. Why did the volume of wtter in the dialysis bag seem to increase?

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Category:- Biology
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