what is indicators??
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An indicator or acid - base indicator is a dye that changes its colour in acidic and basic medium differently. An indicator is a chemical substance (dye) which indicates whether the given compound is acid or base by changing its colour. The most common indicators are, Litmus, Phenolphthalein and Methyl Orange.....
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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Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.
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