Fehling's solution reduction. Fehling's solution before (left) and after (right) reduction by ethanal. This reaction occurs when an aldehyde, such as

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Fehling's solution reduction. Fehling's solution before (left) and after (right) reduction by ethanal. This reaction occurs when an aldehyde, such as ethanal, is added to Fehling's solution and boiled. The copper in the Fehling's solution precipitates out, causing the colour change.

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Keywords: 2, aldehyde, background, change, chemical, chemistry, colour, copper, cupric, duo, experiment, fehlings, hydroxide, lab, laboratory, oxidation, oxidising, oxidizing, pair, reacting, reducing, school, science, solution, test, testing, tube, tubes, white