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Weighing method of finding water potential
Member rating: No Rating | Words: | Submitted: Mon Sep 08 2003
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Karl Byrne 137 Mrs. Knight Prediction I predict that the potato and carrot samples will lose mass proportionately to the concentration of the sucrose solution. This is because of water potential, and the fact that the higher the solute potential of the solution the lower its overall water potential. Results Change in Mass of Potato Tissue Placed in Varying Concentrations of Sucrose Solution Molarity/mol dm-3 of sucrose solution Weight of potatoes Before (In Grams) Weight of Potatoes After (In Grams) Difference Between the two masses Percentage Change in Mass 0.0 0.52 0.80 +0.28 +53.84 0.1 0.68 0.67 -0.01 -1.47 0.2 0.70 0.64 -0.06 -8.57 0.3 0.61 0.46 -0.15 -24.59 0.4 0.61 0.47 -0.14 -22.95 0.5 0.52 0.42 -0.10 -19.23 Change in Mass of Potato Tissue Placed in Varying Concentrations of Sucrose Solution(Class Averages) Molarity Of Solution Percentage change in Mass 0.0 +18.47 0.1 +3.33 0.2 +0.08 0.3 -11.79 0.4 -21.28 0.5 -22.45 Change in Mass of Carrot Tissue Placed in Varying Concentrations of Sucrose Solution Molarity Of Solution Percentage change in Mass 0.0 +15.40 0.2 +12.68 0.4 +5.43 0.6 -4.07 0.8 -4.85 Interpretation Water can move very easily into and out of a cell by a process called osmosis. This process involves the movement of water from a high concentration to a low concentration across a semi-permeable membrane. In...
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