Question

A colorless solution has a pH close to 3. What will be the change in color if a few drops of phenolphthalein are added?

Answer 1

Phenolphthalein:- It is a colorless synthetic acid-base indicator that turns pink in basic solutions and remains colorless in acidic solutions.

There will be no change in the color of the solution as:

1. The solution has a pH of 3 which indicates it is an acidic solution.
2. phenolphthalein remains colorless in acidic solutions.

Therefore, the solution will remain colorless after the addition of phenolphthalein.