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Chapter 15 Carbohydrates

Explore the oxidation and reduction reactions of monosaccharides such as glucose, galactose, and fructose, including the formation of sugar alcohols like D-sorbitol from D-glucose.

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Chapter 15 Carbohydrates

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  1. Chapter 15 Carbohydrates 15.4Chemical Properties of Monosaccharides

  2. Reducing Sugars Reducing sugars • are monosaccharides with a carbonyl group that oxidizes to give a carboxylic acid • undergo reaction with Benedict’s reagent (Cu2+)to give the corresponding carboxylic acid • include the monosaccharides glucose, galactose, and fructose

  3. Oxidation of D-Glucose, a Reducing Sugar Glucose is oxidized to a carboxylic acid. Benedicts reagent

  4. Reduction of Monosaccharides The reduction of monosaccharides • involves the carbonyl group • produces sugar alcohols called alditols • such as D-glucose gives D-glucitol, also called D-sorbitol

  5. Learning Check Write the products of the oxidation and reduction of D-mannose. D-Mannose

  6. Solution Write the products of the oxidation and reduction of D-mannose. D-Mannitol D-Mannose D-Mannonic acid

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