what is indicator defind it
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Explanation:
pH indicators detect the presence of H+ and OH-. They do this by reacting with H+ and OH-: they are themselves weak acids and bases. If an indicator is a weak acid and is coloured and its conjugate base has a different colour, deprotonation causes a colour change.
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Answer:
PH indicator detect the presence of
H+ and They do this by reacting with
H+ and OH-.
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