Question

Questions A-F

(Molecule above is aldotriose)

drate diagnostic tests, the Benedict's Test for "reducing was once the standard Benedict's test is proportional to the amount of "reducing sugar" present 2. Of the carbohyd test for glucose in the urine of diabetics. The amount of brick-red precipitate formed in the sugars" is perhaps the most significant, as it in the urine. tion of the Benedict's test, the two reactants are the sugar and the Cu?' ion. Consider performing the Benedict's Test on the monosaccharide you drew above. a) Which fiunctional group enables the monosaccharide to act as a "reducing sugar"? b) What type of chemical reaction does that organic functional group undergo? c) What is the product functional group? d) What tvype of chemical reaction does the Cu2 ion of the Benedict's reagent undergo? e) What oxidation state does copper have on the product side of the chemical reaction? f) Use structures to show the reaction of an aldotriose with the Benedict's reagent. Draw all reactants and products, both organic and inorganic.

Answer 1

The monosaccharide is an aldotriose.

a) the functional group that makes it reducing sugar is ALDEHYDE (-CHO)

b) The organic functional group of ALDEHDE UNDERGOES OXIDATION .

c)After oxidation the product functional group is CARBOXYLIC ACID

d) Cu+2 of Benedict's reagent undergoes REDUCTION

e)The cu+2 of the reagent is reduced to Cu+1 (as Cu2O brick red precipitate)

f)

cHo coo CoH 2. D- Aldohexose aldahyde