Blue litmus paper in acid

Blue litmus paper in acid

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Caption: Litmus paper being dipped into an alkaline solution. Litmus paper is either red or blue (as here). The red form turns blue in alkalis. The blue form turns red in acids.

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Keywords: acid, acidic, analysis, analytical, beaker, blue, chemical, chemistry, colour change, dipping, experiment, glassware, hand, holding, indicator, lab, laboratory, litmus, no-one, nobody, paper, reacting, reaction, school science, science education, solution, test

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