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Activity No. 3
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Reducing sugars may be differentiated from each other by the osazones they form with __________
Phenylhydrazine
Osazones are ______ compounds which have characteristics forms, definite time of formation, and different relative solubilities in hot water.
yellow crystaline
Some of the monosaccharides give _______ which differ in their rates of formation.
identical osazones
Fructose froms an osazone faster than _________ even though the osazones formed are the same.
Glucose
______ is used to differentiate helical from non-helical or linear polysaccharides.
Iodine Solution
__________ like amylose trap iodine molecules, producing the characteristic ____________ complex.
Unbranched helical polysaccharides, deep blue-black
Amylopectin which is branched and helical, gives a ______ or ________ with iodine.
purple or red-violet color
Glycogen gives colors varying from _________ to ______.
Wine red to brown
The color differences are apparently related to the extent of _____________.
coiling in the glycogen
________,_______, and ________ have linear structures and thus, give no color with iodine or the color of iodine solution is retained.
Cellulose, Inulin, Gum-arabic, and Agar-agar
_______ and _______ do not form dark colors with iodine because they are too small to trap iodine molecules.
monosaccharides and disaccharides
LAB ACTIVITY:
MATERIALS-
CHEMICALS-
(
Study procedures in the book
)
What is the title of Activity No. 3?
QUALITATIVE ANALYSIS CARBOHYDRATES (II)
What are the 2 test in this activity?
A. Osazone Formation
B. Iodine Test for Polysaccharides
Author
JhanAxis
ID
359896
Card Set
Activity No. 3
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Updated
2022-11-18T06:17:04Z
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