What is the definition of Normality in a solution?

Normality is defined as a measure of concentration in a solution, specifically focusing on the amount of solute in relation to the volume of the solution. It quantifies the number of equivalents of solute per liter of solution, which is critical in chemical reactions, particularly in acid-base and redox reactions. Understanding normality is essential because it provides a more precise means of conveying how reactive a solution can be compared to other measures of concentration, such as molarity.

The other definitions do not align with what normality represents. For instance, measuring the weight of a compound would be better described in terms of molar mass or weight percentage. The pH level refers to the acidity or alkalinity of a solution, which is a distinct concept from normality, and the temperature of a solution does not pertain to concentration but instead affects solubility and reaction rates. Therefore, identifying normality solely as a measure of the concentration of a solution helps clarify its practical application in laboratory and industrial settings.