What is an indicator? Name of commonly used indicators?
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Any of many substances, such as litmus, used to indicate the concentration of a substance, or the degree of a reaction.
Eh.litmus,ph paper
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An indicator is a 'dye' that changes colour when it is put in an acid or a base. The three most common indicators are: Litmus, Methyl orange and Phenolphthalein.
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