Why do we use indicators in acid-base titrations?

Answer 1

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

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.......

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Answer 2

Luna Chen

We use indicators in acid-base titrations to visually determine the endpoint of the reaction, where the stoichiometric amount of acid or base has been added to neutralize the other. Indicators change color at specific pH levels, helping to identify when the reaction is complete.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.