Question

what the indicator is used in titration?

Answer 1

phenolphthalein is used as an indicator in titration.

Answer 2

Indicator: A substance that changes color in response to a chemical change. An acid-base indicator (e.g.,phenolphthalein) changes color depending on the pH. Redox indicators are also used. A drop of indicator solution is added to the titration at the beginning; the endpoint has been reached when the color changes.