If a solution turns pink with phenolphthalein, what can be inferred about its pH?

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Prepare for the Acids, Bases, and Salts Test. Study with flashcards and multiple-choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

If a solution turns pink with phenolphthalein, what can be inferred about its pH?

Explanation:
Phenolphthalein is an indicator whose color reflects the solution’s pH. It stays colorless in acidic and neutral solutions, but turns pink in basic (alkaline) ones. So a pink color means the pH is above about 8.2, indicating a basic solution rather than acidic or neutral. Extremely acidic would not produce pink.

Phenolphthalein is an indicator whose color reflects the solution’s pH. It stays colorless in acidic and neutral solutions, but turns pink in basic (alkaline) ones. So a pink color means the pH is above about 8.2, indicating a basic solution rather than acidic or neutral. Extremely acidic would not produce pink.

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