Question

What is an indicator? Describe what you would expect to see if one or two drops of phenolphthalein were added to solutions that were...

1. Neutral
2. Basic
3. Acidic

Answer 1

An indicator is a substance that show the presence of a chemical substance. For this indicator, neutral will be clear, basic pink, and acidic clear.

Explanation:

Phenolphthalein is an acid-base indicator and changes color based on a solution’s pH. The indicator is clear and colorless in a neutral or acidic solution. It turns pink in a basic solution.

So, in neutral solution, it will remain clear
In an acidic solution, it will remain clear.
In a basic solution, it will turn pink.