Acidity indicator colours

Acidity indicator colours

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Caption: Acidity indicator colours. Three test tubes containing an indicator solution and, from left to right, an acid, neutral water, and an alkali. An indicator is a chemical or mixture of chemicals that has a different colour depending on the pH (acidity) of the solution it is added to.

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Keywords: acid, acidity, alkali, change, chemical, chemistry, colour, colours, indicating, indicator, laboratory, neutral, ph, solution, test tube, test tubes, three, trio, universal indicator

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