Question

if a solution is undergoing a reaction where co₂ is being created a product, what color is the phenol red - containing solution shifting toward?
multiple choice
red
yellow
pink

Explanation:

Phenol red is a pH indicator. When \(CO_2\) is produced, it reacts with water to form carbonic acid (\(H_2CO_3\)).
The formation of carbonic acid lowers the pH of the solution.

Phenol red is yellow in acidic conditions.

Answer:

yellow