What indicates the end point of a titration?

The end point of a titration is indicated by a color change of an indicator, which appraises the point at which stoichiometric equivalence has been achieved between the titrant and the analyte. This is a crucial step in titrations because it allows the operator to determine precisely when the amount of titrant added is chemically equivalent to the amount of substance in the solution being analyzed. Indicators are typically chosen based on the pH range of the expected equivalence point, and their color change signals that the target concentration has been reached.

In the context of titration, a color change is a reliable visual cue, ensuring accuracy in determining the endpoint. Other methods, while they can indicate certain reaction statuses, do not directly correlate to the precise stoichiometric balance required for a successful titration.