Litmus paper test

Litmus paper test

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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Litmus paper test. Blue litmus paper turns red in the presence of an acid. The juice from the lemon contains citric acid. Litmus is an organic material derived from plants. Litmus paper is a quick test to show if a liquid is acid or alkali, but it does not show its strength.

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Keywords: acid, acidic, acids, blue, chemical, chemistry, citric, citrus, fruit, hand, hands, holding, indicator, lemon, litmus paper, ph, science experiment, test, testing

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