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September 17, 2014

Homework Help: Biology

Posted by CrissyXD on Tuesday, April 3, 2012 at 9:00am.

In class, I did an experiment with water and iodine solution in a beaker and also starch in a dialysis tube tied and placed in the beaker.

There were discussion questions I couldn't answer surely... please check my answers.

1. a)Use your results to determine the direction of net water movement in this experiment.
-water is moving into the starch solution

b)Is there a way to confirm this?
-increased water level of starch solution

2. Where was the concentration of water molecules greatest at the beginning of the experiment, inside or outside the tubing?
-outside of the tubing.

3. Explain the results of your experiment in terms of osmosis?
-because there was less water concentration in starch, the more concentration of water outside the tube went through the semipermeable membrane, or osmosis through to the starch solution.

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