Fehling's reaction

Fehling's reaction

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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Fehling's reaction. Fehling's reagent (blue, left) is used to test for aldehydes, such as simple sugars. The reagent has a blue colour as it contains copper ions. The test tube on the right contains Fehling's reagent that has been reduced by glucose, turning the copper ions red.

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Keywords: after, analysing, before, chemical, chemistry, copper ion, duo, equipment, experimenting, fehling's reaction, glucose, indicator, ions, pair, precipitate, reacting, reagent, sugar, sugars, test, test tube, test tubes, testing, two

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