What is the term used for the number of moles of solute per liter of solution?

The term that describes the number of moles of solute per liter of solution is Molarity. Molarity is a fundamental concept in chemistry that measures the concentration of a solute in a solution, expressed as moles of solute divided by the volume of the solution in liters. This measure is particularly useful because it provides a direct relationship between the amount of solute and the volume of the solution, making it easier to prepare solutions with precise concentrations.

Molarity is essential in many chemical calculations, including stoichiometry and titration, where accurate concentrations are necessary to predict the outcomes of reactions accurately. This concept is distinct from other measures of concentration, such as molality, which describes moles of solute per kilogram of solvent, or normality, which refers to the number of equivalent moles of a solute per liter of solution. Concentration itself is a broader term that can refer to any measure of how much solute is present in a given amount of solvent or solution, but it does not specify the method of measurement. Hence, in this specific context, Molarity is the precise term being referenced.