Litmus Test

Litmus Test

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Credit: RICHARD HUTCHINGS/SCIENCE PHOTO LIBRARY

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

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Keywords: alkali, alkaline, analysis, analytical, beaker, chemical, chemistry, colour change, dipping, experiment, glassware, hand, holding, indicator, lab, laboratory, litmus, paper, reacting, reaction, red, solution, test, vertical

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