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Unformatted text preview: through a selectively permeable membrane? Explain your answer. Size and solubility determine whether molecules pass through a selectively permeable membrane because if the molecule is too big or it is not soluble it will not pass through the membrane. 5. Define osmosis. Osmosis is the net diffusion of water across a selectively permeable membrane. 6. Explain how the experiments you performed demonstrated the principle of osmosis. The experiments showed that the solutes affected the concentration and diffusion of water. 7. A potato cube is placed in an unknown solution and weighs significantly more when removed and weighed after one hour. Is the unknown solution hypertonic, isotonic, or hypotonic? isotonic...
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- Spring '11