difference stoichiometric end point and end point in an acid-base titration
In an acid-base titration, the stoichiometric endpoint and the endpoint refer to different stages of the titration process.
The stoichiometric endpoint can be determined using stoichiometry, which involves calculating the exact amount of reactant required for a complete reaction. In an acid-base titration, the stoichiometric endpoint occurs when the moles of the acid and base are in a 1:1 ratio, based on the balanced chemical equation. This is the point where all the acid has reacted with the base, or vice versa, according to the stoichiometry of the reaction. The stoichiometric endpoint is not observable directly and is determined through calculations.
On the other hand, the endpoint of the titration is the point at which a noticeable change occurs, indicating that the reaction is complete. It is determined experimentally by using an indicator or pH meter to monitor changes in the solution's acidity or basicity. The endpoint is typically when the color of the indicator changes, indicating that the reaction has reached completion. Unlike the stoichiometric endpoint, the endpoint is observable and marks the end of the titration.
It is important to note that the stoichiometric endpoint and the endpoint are not always the same. The stoichiometric endpoint is the theoretical point where complete neutralization occurs based on stoichiometry, while the endpoint is the experimental point that is visually observed using an indicator or pH meter.