The use of a stir bar in titration, such as in acid-base titrations, depends on the specific requirements for precision in mixing the solutions to accurately determine concentrations when reaching the equivalence point.
The use of a stir bar in a titration depends on the type of titration and the desired precision of the results. While it is not always necessary, a stir bar can improve accuracy by ensuring that the solutions are well-mixed, which is particularly important during a titration to ensure proper interaction between the titrant and the analyte.
During an acid-base titration, a buret is used to deliver a titrant of known concentration to a solution with an unknown concentration. The goal is to determine the concentration of the unknown by reaching what is known as the equivalence point. At this point, the amount of titrant added is stoichiometrically equivalent to the amount of substance in the unknown solution.
Indicators are used to show when the equivalence point is reached, which is critical for the titration's accuracy. Different indicators are selected based on the type of titration performed and the pH range over which they change color.