General Knowledge · Chemistry

Phenolphthalein, a commonly used acid-base indicator, changes from colorless to pink at which pH range?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

12.0 – 4.0
26.0 – 7.0
34.5 – 6.5
48.2 – 10.0✓

Correct answer

8.2 – 10.0

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Phenolphthalein, a commonly used acid-base indicator, changes from colorless to pink at which pH range?

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