When does phenolphthalein turn pink?

in the presence of a base

in the presence of an acid

when it is in a neutral solution

when it is reacting with a metal

Question

Alejandro Velasquez

Chemistry

2 September, 18:05

When does phenolphthalein turn pink?

in the presence of a base

in the presence of an acid

when it is in a neutral solution

when it is reacting with a metal

+3

Answers (2)

Know the Answer?

Elijah Conley · Answer 1

Answer : in the presence of a base

Explanation:

Phenophthalein is an acid base indicator which changes it's color. It turns pink when exposed to the pH of 8.2 that is basic in nature. It may turn purple when exposed to higher pH values. The color change occurs due to change in charge and shape of the phenophthalein molecules. It remains colorless in acidic solutions. Therefore, it can be useful for detection of basic solutions.

Rafael Reynolds · Answer 2

the answer is (A) in the presence of a base

When does phenolphthalein turn pink?in the presence of a basein the presence of an acidwhen it is in a neutral solutionwhen it is reacting with a metal

When does phenolphthalein turn pink?

in the presence of a base

in the presence of an acid

when it is in a neutral solution

when it is reacting with a metal