Overviewing experiments for a diffusion and osmosis lab report: how to understand the basic principles of cellular transport mechanisms via simple experiments. It is not an. The mechanism responsible for driving osmosis has commonly been represented in biology and chemistry texts as either the dilution of water by solute resulting in lower concentration of water on the higher solute concentration side of the membrane and therefore a diffusion of water along a concentration gradient or by a solute's attraction to water resulting in less free water on the higher solute concentration side of the membrane and therefore net movement of water toward the solute.
But the combined effects of all of these, and I'd love if any of y'all to point me to a nice simulation or maybe we'll create one on the Khan Academy computer science program to show this, is that you're going to have a higher probability of the water molecules over here going from left to right than the water molecules over here going right to left, from mechanical blockage and or these big molecules ricocheting off and pushing them in the wrong direction, or because they're just stuck to the big molecules because the big molecules are charged.
The more concentrated the salt solution, the bigger the difference in size and weight of the potato slice. Length - the decrease in the number of water molecules results in loss of volume. The push of the water molecules result in expansion in all dimensions, including length.
This secondary separation can be more efficient than a reverse osmosis process would be alone, depending on the draw solute used and the feedwater treated. Usually the osmotic gradient is used while comparing solutions that have a semipermeable membrane between them allowing water to diffuse between the two solutions, toward the hypertonic solution the solution with the higher concentration.
Osmosis can be demonstrated when potato slices are added to a high salt solution. The sodium molecule can't make it through. The first is the hypertonic solution. On italy essay reports on alcohol abuse silent spring theme analysis essay. You can kind of imagine all of these water molecules sticking to the sodium molecule, which would make it less likely that these would pass from right to left than the ones that are passing from left to right.