___is a natural indicator
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tumaric
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Answer:
Phenolphthalein, (C20H14O4),
Explanation:
Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution's pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0.
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