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Concentrations of solutions in chemistry are usually expressed as molarity, which is the number of moles of solute per liter of solution. To find the molarity of a solution requires knowing the mass of dissolved solute the volume of the solution and molar mass of the solute. Molarity is defined as the number of moles of solute dissolved in 1 liter of solution.. Molarity Formula is given below. Thus molarity has the units moles per liter (mol L-1).
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.