What is the term for the concentration of a solution expressed as moles of solute per liter of solution?

The term for the concentration of a solution expressed as moles of solute per liter of solution is molarity. Molarity is a commonly used unit in chemistry that indicates how many moles of solute are present in one liter of the solution. It is expressed as moles/L and is a crucial parameter for understanding concentration in solutions, facilitating calculations in stoichiometry, dilution, and other chemical reactions.

Molarity differs from other concentration measures: for instance, molality refers to moles of solute per kilogram of solvent, which is a way to express concentration that is independent of temperature. Mole fraction is the ratio of the number of moles of a component to the total number of moles in a mixture, while mass percent describes the mass of a solute as a percentage of the total mass of the solution. Each of these terms serves a distinct purpose in chemistry, reinforcing why molarity specifically refers to the moles of solute per liter of solution.