What is the colour given by phenolphthalein when acid and base substance are dip in it?
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A substance below pH 7 is considered acidic; above pH 7 is considered basic. Phenolphthalein is naturally colorless but turns pink in alkaline solutions.
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The Phenolphthalein pH Range
A substance below pH 7 is considered acidic; above pH 7 is considered basic. Phenolphthalein is naturally colorless but turns pink in alkaline solutions.
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