DEFINE INDICATORS???
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Indicators are substances that change colour when they are added to acidic or alkaline solutions.
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༶•┈┈⛧┈♛A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions or hydrogen ions in the Arrhenius model.
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