---
title: "Endpoint — AP Chem Definition & Titration Guide"
description: "The endpoint is the observable signal (like an indicator color change) that a titration is done. Learn how it differs from the equivalence point on AP Chem."
canonical: "https://fiveable.me/ap-chem/key-terms/endpoint"
type: "key-term"
subject: "AP Chemistry"
---

# Endpoint — AP Chem Definition & Titration Guide

## Definition

The endpoint in a titration is the point at which the indicator changes color, signaling that all of the reactant has been neutralized.

## Related Study Guides

- [4.6 Introduction to Titration](/ap-chem/unit-4/intro-titrations/study-guide/8XHQYjYki6GqAcrp18I2)

## Review

### Related Terms

- [Titration](/ap-chem/key-terms/titration): A method used to determine the concentration of an unknown solution by adding a known volume and concentration of another solution until reaction completion.
- [Indicator](/ap-chem/key-terms/indicator): A substance that changes color at different pH levels and is used to signal when a reaction has reached its endpoint.
- [Neutralization Reaction](/ap-chem/key-terms/neutralization-reaction): A type of chemical reaction where an acid reacts with a base to produce water and salt. This is what happens during titration up until we reach our "finish line" or endpoint.