Melvin, ace biology student, is making a display for Ms. Fishhawk's class to show what "isotonic," "hypertonic" and "hypotonic" mean. Melvin has a tank where the two sides are separated by a semi-permeable membrane. The figure shows the solutions that Melvin pours into each side of the tank. 30% starch 70% water A 5% starch 95% water B the a. Label the figure to show which side is the hypertonic side and which is the hypotonic side. b. After loading the tank with the solutions, Melvin lets the tank sit for 20 minutes. Assuming membrane is the same as the dialysis membranes we used in lab, will the volume of the two solutions change? In what way?

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.