After performing a titration, what unknown quantity can typically be calculated?

In a titration, typically the unknown quantity that can be calculated is concentration. This is because titration involves the gradual addition of a solution of known concentration (the titrant) to a solution of unknown concentration (the analyte) until the reaction reaches equivalence. By monitoring the volume of the titrant added, along with its known concentration, one can apply stoichiometric relationships to determine the concentration of the unknown solution.

The relationship used in the calculation is based on the balanced chemical equation for the reaction, allowing the determination of how much of the analyte was present in relation to the amount of titrant used. This process relies on the equivalence point, at which the number of moles of titrant equals the number of moles of analyte.

While volume, mass, and density are all important parameters in analytical chemistry, they are not the primary outcome of a titration. The volume of titrant used is a measurable quantity, but it’s the concentration of the analyte that is usually the focus of interest due to the titration process, making concentration the correct answer in this context.