Tollens' reagent
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Tollens' reagent is a chemical reagent used to distinguish between aldehydes and ketones along with some alpha-hydroxy ketones which can tautomerize into aldehydes. The reagent consists of a solution
Tollens' test for aldehyde: left side positive (silver mirror), right side negative
Silvering
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Silvering is the chemical process of coating a non-conductive substrate such as glass with a reflective substance, to produce a mirror. While the metal is often silver, the term is used for the applic
Tollens' reagent
…chemist Bernhard Tollens. A positive test with Tollens' reagent is indicated by the precipitation of elemental silver, often producing a characteristic "silver mirror" on the inner surface of the reaction vessel. This reagent is not commercially available due to its short shelf life, so it must be freshly prepared…
Silvering on the inside of a glass test tube
Aluminising tank at Mont Mégantic Observatory used for re-coating telescope mirrors.
To speed up the reaction process of the silver, the ornaments are shaken in hot water, Lauscha