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If we assume that the density of the solution is almost equal to that of pure water (1 kg/L), then we find that 1 L of solution will weigh 1 kg. If 1 kg of solution contains 0.0001 M of sucrose , then it is 0.0001 m in sucrose, so the molarity and molality are almost the same. I think they are numerically the same to several decimal places.
MOLARITY and OSMOLARITY. The concentration of a solute in a solution is expressed as its âMolarityâ. It tells you how much of a solute is present. The units of molarity are âmolesâ (mols). Osmolarity is a concept that allows you to determine if water will move from one side of a membrane to the other side.he concentration of a solute in a solution is expressed as its âMolarityâ. It tells you how much of a solute is present. The units of molarity are âmolesâ (mols). Osmolarity is a concept that allows you to determine if water will move from one side of a membrane to the other side.