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Reducing sugars. Benedict's reagent (often called Benedict's qualitative solution or Benedict's solution) is a chemical reagent and complex mixture of sodium carbonate, sodium citrate, and copper (II) sulfate pentahydrate. [ 1 ] It is often used in place of Fehling's solution to detect the presence of reducing sugars and other reducing ...
Reducing form of glucose(the aldehyde groupis on the far right) A reducing sugaris any sugarthat is capable of acting as a reducing agent.[1] In an alkalinesolution, a reducing sugar forms some aldehydeor ketone, which allows it to act as a reducing agent, for example in Benedict's reagent. In such a reaction, the sugar becomes a carboxylic ...
Formation of copper(I) oxide is the basis of the Fehling's test and Benedict's test for reducing sugars. These sugars reduce an alkaline solution of a copper(II) salt, giving a bright red precipitate of Cu 2 O. It forms on silver-plated copper parts exposed to moisture when
Monosaccharides. In organic chemistry, Fehling's solution is a chemical reagent used to differentiate between water-soluble carbohydrate and ketone (>C=O) functional groups, and as a test for reducing sugars and non-reducing sugars, supplementary to the Tollens' reagent test. The test was developed by German chemist Hermann von Fehling in 1849.
In organic chemistry, a ketose is a monosaccharide containing one ketone (>C=O) group per molecule. [1][2] The simplest ketose is dihydroxyacetone ((CH2OH)2C=O), which has only three carbon atoms. It is the only ketose with no optical activity. All monosaccharide ketoses are reducing sugars, because they can tautomerize into aldoses via an ...
Aldonic acids are the products of the oxidation of aldoses by Benedict's or Fehling's reagents. [ 6 ] Copper ions react with an aldose to form a red precipitate, Cu 2 O. The reaction scheme of an aldose being oxidized by the copper ions in a Benedict's reagent solution. The R group provided is an example of a sugar backbone.
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Tollens' reagent (chemical formula ) 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 of silver nitrate, ammonium hydroxide and some sodium hydroxide (to maintain a basic pH of the reagent solution).