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Investigating Osmosis: The Molarity Of A Potato Cell Introduction Knowing that osmosis (diffusion of water) will occur across a semi-permeable membrane whenever there is a difference between the water concentrations on the two sides of the membrane, and knowing that when this happens to cells, they will either become turgid if water flows into them, or plasmolysed if water flows out of them, therefore changing their volume. I want to test the hypothesis that: If the concentration of a solution into which a cylinder of potato is placed is greater than a certain level the cylinder will decrease in mass, and if the concentration is less than that level it will increase in mass. Prediction I believe from my past knowledge of a similar experiment involving raw eggs that the potato cylinders placed in the distilled water will be hypertonic, therefore the water will diffuse by osmosis into the potato from an area of...

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