North Rhine-Westphalia Zentralabitur Chemistry Practice Questions - North Rhine-Westphalia Zentralabitur Chemistry (Chemie) Exam

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What indicator property makes phenolphthalein useful for detecting the equivalence point of a strong acid-strong base titration?

It changes color (colorless to pink) around pH 8.2-10, near the equivalence point's neutral-to-basic transition It only changes color at pH 0 It permanently reacts with the acid, consuming it entirely It has no measurable color change at any pH

Correct Answer:

It changes color (colorless to pink) around pH 8.2-10, near the equivalence point's neutral-to-basic transition

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