... the cell to the exterior solution. This is because there are more water molecules inside the cell than outside, so there is net movement out of the cells in order to create equilibrium. This is how I think the graph will look. + % Change Conc. - The 'S' shaped curve comes about because not all of the potato cells are identical, different ones have different water and sucrose concentrations inside them. Background information Osmosis can be defined as the net movement of water particles, through a partially permeable membrane, from an area of relatively high water potential to an area of relatively low water potential. Osmosis is merely a special case of diffusion, where only water molecules move through the membrane. An example of osmosis is the movement of water from a solution to a piece of potato in the solution, or vice versa. The membrane in this case is ...

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