# Why do we use indicators in acid-base titrations?

Classically, such indicators were used in an acid-base titration. The precipitous rise in pH during a titration means that a selection of indicators can be used, and $p {K}_{a} \left(\text{indicator}\right)$ can be around $4 - 10$; as seen in a titration of acid with base, the endpoint occurs within $0.01 \cdot m L$ (approx. 1 drop) of added titrant.......