Litmus paper

Litmus paper

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Credit: SCIENCE PHOTO LIBRARY

Caption: Litmus papers being dipped into different solutions. Litmus paper is either red or blue. The red form turns blue in alkalis. The blue form turns red in acids.

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

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