Which equation represents the normality calculation?

The correct equation for calculating normality is represented by the formula where the product of the normality and volume of one solution equals the product of the normality and volume of another solution. This is critical in titration and analytical chemistry, where it is essential to ensure that the equivalents of reactants are equal when they react.

In this context, the equation helps in determining how much of a certain concentration of a solution is needed to react with a given concentration of another solution. By expressing the equation as the product of normality (N) and volume (V) for each solution, it aligns with the fundamental principle of chemical reactions—where the amount of reactants must be balanced.

Using this equation, one can calculate the unknown normality or volume of a solution when the other variables are known. In analytical practices, such as titrations, achieving stoichiometric balance is vital, which this equation facilitates.

This understanding illustrates how important it is to keep track of the concentrations of solutes during reactions, especially when dealing with acid-base and redox titrations. Thus, the formulation reflects the relationships among volumes and normalities for complete and accurate computations in lab settings.