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G.C.S.E Coursework Investigation On Osmosis. Osmosis is as follows: When a solution is separated by a semi-permeable membrane from its pure solvent or from a more dilute solution, through the membrane and into the concentrated solution. The solvent is nearly always water. Theoretically the passage of the water would go on until the concentrations on both sides of the membrane were equal. It may seem paradoxical to say that the concentrated solution is exerting an osmotic pressure when it seems, to sucking water into itself. In the experiment described above, the pressure from the concentrated solution supports the column of fluid in the delivery tube above it. The pressure can also be demonstrated by partially filling a pig's bladder with syrup, trying it tightly and immersing it in water. The osmotic pressure of the syrup causes water to pass in through the walls of the bladder, distending and sometimes bursting out...

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