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Properties of carbohydrates. DATA COLLECTION a) Dehydration GLUCOSE m = 0.5 g
OBSERVATION Change of state Color Viscosity Smell Start Solid state. White color. ...
... Carbohydrates contain Carbon, Hydrogen and Oxygen. ... HEXOSES C6H12O6 eg glucose, fructose -
respiration, photosynthesis Properties of Monosaccharides 1. Sweet ...
... 5. One of the macromolecules is carbohydrate. 6. Carbohydrates are composed
of sugars. ... 27. One of the properties of life is metabolism. 28. ...
... Made up of two or more elements • Always has elements present in the same ratio
by mass • Has properties that are ... Include carbohydrates (sugars), proteins ...
... depends upon the chemical makeup of cells and on the chemical properties of the ...
Carbohydrates, lipids, proteins, and nucleic acid are the four major classes of ...
Submitted by xpika on January 21, 2008
Category: Miscellaneous
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DATA COLLECTION
a) Dehydration
GLUCOSE
m = 0.5 g
OBSERVATION Change of state Color Viscosity Smell
Start Solid state. White color. No. No smell.
Action of heat Liquid state. Amber color. Yes. Smell of caramel.
Sulphuric acid Liquid state. White color. Yes. No smell.
Sulphuric acid + heat Liquid state. Black color. Yes. Smell of rotten eggs.
Sulphuric acid + strongly heated Solid state. Black color.
(Because of the gases volumen raises – we get charcoal.) No. Like setting on fire, because of SO2.
Table 1: Data collection from glucose in reaction known as dehydration
SUCROSE
m = 0.5 g
OBSERVATION Change of state Color Viscosity Smell
Start Solid state. White color. No. No smell.
Action of heat Liquid state. Amber color. Yes. Smell of caramel.
Sulphuric acid Liquid state. White color. Yes. No smell.
Sulphuric acid + heat Liquid state. Black color. Yes. Smell of rotten eggs.
Sulphuric acid + strongly heated Solid state. Black color. (Because of the gases volumen raises – we get charcoal.) No. Like setting on fire, because of SO2.
Table 2: Data collection from sucrose in reaction known as dehydration
In this part of experiment we should make also tests for CO, CO2, SO2. We did not do it but we told how we can do them:
- CO2 test: we put the mixture in lime-pit and blow inside. After that we should see white precipitation if CO2 is inside.
- CO and SO2 test we make so that we conduct them in water and then measure pH.
b) Oxidation
Carbohydrate Fehling 1 and 2 Observations at Fehling reaction Tollen`s reagent Observations at Tollens reaction
Sucrose Negative Stays blue Negative Colorless
Fructose Positive Orange- green Positive Silver mirror
Maltose Positive Orange- green Positive...
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