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Prediction: I think that the potato will absorb water making it heavier, because of diffusion this is where the movement of particles go from a region of high concentration to a region of low concentration along a concentration gradient. The potato cannot gain as much water in a beaker with 80 % sugar solution and 20% water than a beaker with 20% water and 80%sugar solution. This all adds up to what the molarity is equal too, and that the water in the beaker is at a higher concentration and the space inside the potato is at a low concentration and the water is at a high concentration, via osmosis the potato moves from a low concentration to a high concentration along a concentration gradient. So the cells of the potato become turgid and press up against the cell wall (like a balloon inside a box!). The diffusion off water...

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