Effect of Concentration on Osmosis Essay -- GCSE Biology Osmosis Cours

Effect of Concentration on OsmosisAimTo find out how the meanness of saccharose consequence affects the massof the tater geek left in the solution for one day.PredictionI predict that when the sucrose concentration is low the white white potato chipwill gain mass. This is because there will be a higher sucroseconcentration in the potato chip so piss will go into the potato fromthe solution. I predict that when there is a high concentration ofsucrose the potato will lose mass. This is because there is a higherconcentration of sucrose solution in the solution compared to that inthe potato chip so water from the potato will go into the solution toeven it out.Osmosis is the movement of a solvent by dint of a selectively permeablemembrane (as of a living cell) into a solution of higher soluteconcentration that tends to equalize the concentrations of solute onthe two sides of the membraneOsmosis is the movement of water from high water concentration tolower water concentration thro ugh a selectively permeable membrane.Selectively permeable membranesare very thin layers of material (cellmembranes are selectively-permeable), which allow some molecules topass through them nevertheless prevent other molecules from expiry through.Cell membranes will allow small molecules like Oxygen, water, CarbonDioxide, Ammonia, Glucose, amino-acids, and so on to pass through. Cellmembranes will not allow larger molecules like Sucrose, Starch,protein, etc. to pass through.In my experiment I will have a test tube with a potato chip in. Theoutside argue of the potato chip is selectively permeable so it letswater pass through it but not bigger molecules such as sucrose. In thetest tubes I will put different concentrations of sucrose solution.When the concentration of the solution is lower than that in thepotato, water will pass through the selectively permeable wall into thepotato.Potato cellsSucrose solutionThe mass of the potato chip increasesSucrose moleculeWater moleculeWhen the sucrose solution is stronger outside if the potato chip waterwill move out from the potato chip into the solution.When the concentration is the same on both sides of the selectivelypermeable wall nothing passes through it and the mass will stay thesame.PlanApparatusFive test tubesLabelsRulerScalesTissue... ...hips in each test tube. This would make it more accurate as when Ihad two in a test tube if one of them was a long way out it made thegraph not total the line well when I plotted the averages.There was one anomalous result at 0.5 mol. I think this was because wepatted them dry when we got them out of the test tubes as we did notwant to weigh there water on the outside of the potato but I thinkthat we may not have dried-out them all equally so this anomalous resultmay have been due to it having water left on the outside of it.Also the potato itself was not from the same part of the potato andwas not exactly the same size, although I did try to cut them to 36mmeach.I coul d also try the same experiment but with different volumes ofcell tissues and see if the percentage change differed with a biggerand smaller surface area.I could now investigate the smaller range in effect(p) to 0.25 to see thesucrose concentration equivalent to the potato.Finally, I could extend the experiment to a more exact level bylooking at the potato cylinders under a microscope, then I would beable to see the cells in greater detail and draw some moreobservational results.