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Preliminary Work Osmosis is the passage of water molecules from a weaker solution into a stronger solution through a partially permeable membrane. Osmosis in potato cells Method - Equal volumes of solution in each test tube, 30ml. We will weigh the mass of each potato core before placing it in sugar solution; we will also measure them all to the same length before putting them into solution. Mass (g) Length (g) Potato Sugar solution (%) Before After Difference Before After Difference A Distilled Water 4.63 5.5 +1.07 3.8 4.1 +0.3 B 10% 4.72 5 +0.28 3.8 4 +0.2 C 40% 4.77 3.1 -1.67 3.8 3.5 -0.3 Conclusion The experiment shows that test 'A' showed an increase in length and mass, this is because the concentration of water in the potato cells was less than that of the surrounding solution. Through the process of osmosis water was absorbed into the potato causing growth in length and mass. The test 'C' shows a decrease in length and mass, this was because the potato cells had a higher concentration of water than the surrounding solution. Osmosis caused the water to transfer from the potato...

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