Sucrose Hypothesis For Osmosis

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Osmosis is a special case of diffusion. It is when the passage of water from a dilute solution moves through a semi-permeable membrane to a more concentrated solution. Selective permeability is whether solutes can cross through a membrane freely or not at all. Plant cells and animal cells differ in that plant cells have a strong cell wall and animal cells do not have cell walls. They both can undergo osmosis and both lose water, however the cell wall of plant cells prevent the cells from bursting whereas animal cells will burst because they have no cell wall.

Methods:

Osmosis:

Obtain four, 15cm long sections of dialysis tubing that have been presoaked in RO H2O.

Create bags by folding over one end of each dialysis tube and tying that end …show more content…

Consequently the weight of the sucrose solution bags increased the greatest. The results of this experiment were what was expected and proved the hypothesis to be true because the sucrose solution was of lower concentration due to the fact it increased in weight the most. Thus, the more water moved through the semi permeable membrane compared to the others. If there was anything to change with this experiment, it would be procedurally. I would be sure to use different semi permeable membrane bags that don’t allow water to leak due to the fact that both ends were only closed with a rubber band and it was difficult to ensure the bags were tightly sealed. This could help prevent …show more content…

Specifically for the lab discussed we were to determine whether sucrose of RO H20 was of higher or lower concentration. We were able to determine permeable membranes were depending on the concentration of the solution or solvent. In this case we learned that solution and solvents of lower concentration allow for greater flow through the semi-permeable membrane, which supports the idea of diffusion. We learned that sucrose solution allowed for greater diffusion than RO H20. Also chloride ions and aluminum allowed for diffusion whereas starch and sulfate ions did not. We also learned Elodea in NaCl solution underwent a process called plasmolysis where the cells

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