Pre-Lab Questions
1. Define the following vocabulary terms. Please cite all sources used.
a. Reducing sugar
b. Non-reducing sugar
c. Aldose
d. Ketose
e. Monosaccharide
f. Disaccharide
g. Dichotomous Key
To answer the questions below, use your textbook or the internet to research the structures of the following compounds: fructose, glucose, sucrose, and lactose
2. Barfoed's test is used to distinguish monosaccharides from disaccharides. Monosaccharides react with the copper-containing reagent to produce a red copper-containing precipitate. Which of these sugars do you predict will form a red precipitate?
3. Benedict's test can distinguish between reducing sugars and non-reducing sugars. Reducing sugars react with the reagent to produce a yellow, green, or red precipitate. Which sugar(s) used in this experiment do you predict will form a precipitate?