Question

After adding phenolphthalein to your acidic analyte what color will should you see at the endpoint after titrating with a base?

a) A quick appearing dark pink that disappears after stirring
b) A dark pink color that remains throughout the solution
c) A very pale pink color that remains throughout the solution
d) There should not be a color change at the endpoint

Answer 1

At the endpoint of a titration with phenolphthalein as the indicator, a very pale pink color that remains throughout the solution indicates the completion of the titration.

Step-by-step explanation:

After adding phenolphthalein to an acidic analyte and titrating with a base, you should expect to see a very pale pink color that remains throughout the solution at the endpoint. Phenolphthalein is a common acid-base indicator used during titrations that exhibits a clear and sharp color change interval that correlates with the abrupt pH change at the titration's equivalence point. The endpoint, indicated by phenolphthalein, is characterized by a faint pink hue which indicates that the titration is complete.