Understand the Problem
The question appears to relate to a set of features or indicators associated with a particular subject, likely involving some form of assessment or categorization. It seems to ask about different indicators and specifications for a specific context.
Answer
Phenol red
Phenol red
Answer for screen readers
Phenol red
More Information
Acid-base indicators are substances that change color with pH. Phenol red is an indicator that changes color depending on the pH level of the solution it’s in.
Tips
A common mistake is to confuse the base color of the indicator with its color change behavior under different pH levels.
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