Which process would you use to determine the concentration of an unknown solution?

Titration is a widely used quantitative analytical method in chemistry that allows for the determination of the concentration of an unknown solution. In this process, a solution of known concentration, known as the titrant, is gradually added to the unknown solution until a reaction between the two is complete, typically indicated by a color change or a pH change. This point is known as the equivalence point.

The key advantage of titration lies in its ability to provide precise measurements. By knowing the volume of titrant used and its concentration, calculations can be performed to ascertain the concentration of the unknown solution through stoichiometric relationships. Titration is particularly effective in acid-base reactions, redox reactions, and in cases where a clear endpoint can be detected.

In contrast, evaporation is mainly used to concentrate solutions or recover solids from a liquid phase in a non-quantitative manner. Chromatography is a separation technique that identifies components of mixtures rather than quantifying concentration directly. Filtration is used for separating solids from liquids but does not provide any information on concentration. Thus, titration stands out as the most suitable method for determining the concentration of an unknown solution.