In the context of titration, what is the endpoint?

The endpoint in a titration is defined as the moment when the reaction between the titrant and the analyte is complete, meaning that all the reactants have reacted and no more of either reactant is present in excess. This point is often indicated by a noticeable change, such as a color shift in the indicator used, which signifies that the solution has reached its desired pH or concentration.

In a titration, reaching the endpoint indicates that you have added just the right amount of titrant to completely react with the analyte, such as in a neutralization reaction. The endpoint is crucial because it marks the transition from reactants to products without having an excess of titrant remaining, ensuring accuracy in quantitative analysis.

While factors such as a color change and pH measurements are important during titration, they are secondary to the core concept of the endpoint representing the complete consumption of reactants.