Lab Report Diffusion and Osmosis

Lab Report Diffusion and Osmosis - Kevin Ho-Tuesday 3:10...

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Kevin Ho-09/19/11-Tuesday 3:10 Estimating Osmolarity by Change in Weight Abstract: This experiment will involve samples of potato that have been immersed in different sucrose solutions; you will determine the weight of each potato sample in their respected sucrose sample. After the potato samples have been soaked in the solution, you will determine the change in their weight from the initial weight to the final weight. These results will be used to determine the potatoes’ osmolarity. My hypothesis is that the potato in 0.1M solution is the most isotonic. There will be six potato samples in six different sucrose solutions of 0.0M, 0.1M, 0.2M, 0.3M, 0.4M, 0.5M, and 0.6M. Each potato sample will be incubated in the different solutions for 1.5-2 hours in a 250ml beaker. After this period of time, each potato sample will be weighed using a balance. Each potato sample initially weighs 2.5 grams; the results show that the potato samples in higher mole solutions lose weight while the samples in low mole solutions gain weight. Introduction: This experiment is designed to find the osmolarity of potato tissue. The random movement of particles from high concentration regions to lower concentration regions is known as diffusion. Osmosis uses the principles of diffusion, but the molecules are in a solvent solution across a permeable membrane. By doing this experiment, you can find out the optimum water content
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This note was uploaded on 01/16/2012 for the course BIO 107 taught by Professor Staff during the Fall '11 term at Washington State University .

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Lab Report Diffusion and Osmosis - Kevin Ho-Tuesday 3:10...

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