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Silver mirror test

Silver mirror test

A500/0268

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Credit

ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY

Caption

Silver mirror test. Tollen's reagent reacted with an aldehyde produces a silver mirror (right). This is a diagnostic test used to distinguish between aldehydes (organic compounds with a -CO.H group) and closely related ketones (-CO.C). The Tollen's reagent (ammoniacal silver oxide) and ethanal (or acetaldehyde, CH3CHO) are reacted in a test tube (left). The ethanal reduces the complex silver ions to metallic silver, which deposit on the inside of the reaction vessel (right).

Release details

Model release not required. Property release not required.

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