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... can diffuse into the cells, via osmosis. This occurs if the cells are surrounded by a weak solution e.g. water. If the cells are surrounded by a stronger solution, e.g. salt water, the cells may lose water by osmosis. 1 molar- this will take most of the water out this is because the salt solution is strong. I also think the potato will become lighter because the salt solution is pushing some of the water out until the concentrations are the same . The weight will drop the most because of how much water is being lost, the length will change the most because of how strong the solution is. The diameter will drop by a considerable amount. 0.75 molar- this rather strong solution will push water out enough to make it become flaccid. Causing the length to decrease enough to see a change this will not happen as much as 1 molar ...