If higher concentration of sucrose solution has a potato, then the solution will make the potato to be shrink than lower concentration of sucrose solution does, so the mass of potato should be decreased. The reason is that osmosis is the movement of water particles from a high water potential to a low water potential through a selectively permeable membrane. Then, water molecules from the potato will go out through the semi permeable membrane to the sucrose solution. As the concentration gradient of sucrose solution is high, the mass of potato will be less due to the isotonic of osmosis that tries to be isotonic that a concentration of solutes is the same inside and outside the cell.
