Question

Why do we use indicators in acid-base titrations?

Answer 1

To signal a stoichiometric endpoint...........

Explanation:

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 `pK_a("indicator")` can be around `4-10`; as seen in a titration of acid with base, the endpoint occurs within `0.01*mL` (approx. 1 drop) of added titrant.......