What term refers to the number of moles of solute per liter of solution?

The correct term for the number of moles of solute per liter of solution is molarity. Molarity is a specific measure of concentration that is defined as the number of moles of solute divided by the volume of the solution in liters. This metric is widely used in chemistry because it provides a clear and quantitative way to express the concentration of a solution, which is essential for understanding chemical reactions and calculations involving solutions.

Concentration is a broader concept that can refer to the amount of solute present in a given amount of solvent or solution but does not specify how that concentration is measured. Solubility refers to the maximum amount of solute that can dissolve in a solvent at a specific temperature, which is related but distinct from the idea of molarity. A solution itself is a homogenous mixture composed of two or more substances but does not specify the ratios of solute and solvent. Thus, when referring specifically to the number of moles of solute per liter of solution, molarity is the most accurate and precise term to use.