Which of the following results is to be expected if the set up is left for several hours?
Osmosis is the movement of water molecules from a region of higher water potential to a region of lower water potential through a semi-permeable membrane (the living cells of the yam). Because the salt solution inside the yam is hypertonic (more concentrated) compared to the water outside, water moves into the yam cavity. As a result, the level/volume of liquid inside the yam cavity increases while the level of water in the external container decreases.
A. decrease in the size of the yam: In this specific setup (water entering the yam), the cells would become turgid, potentially causing a slight increase or no visible change in overall size, but certainly not a decrease.
B. movement of the salt solution into the water: A semi-permeable membrane allows only water (solvent) to pass through, not the salt (solute) molecules.
C. decrease in the volume of water inside the yam: Since the salt solution is inside the yam and water is outside, water will move inward due to endosmosis, causing the internal volume to increase, not decrease.
There is an explanation video available below.
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