organic qualitative analysis unit 201
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Organic Qualitative AnalysisUnit 201
content by H Graham BSc PGCEhttp://goes.flexinet.com.au/default.htm
About Combustion All organic compounds contain carbon. All produce CO2 if burnt in air or O2. Steam is also produced. If the amount of O2 is limited CO main form instead of CO2.
ethanol burning
Flames can be luminous or non-luminous
Ethanol does not produce any soot or smoke
Benzene and other aromatic compounds can produce lots of soot! (and have luminous flames)
Why are they different?
About Combustion
ethanol burning
Why are they different? Calculate their
% C% C = mass of carbon/total mass x 100%
C2H5OH C6H6
Which of these would produce the greatest amount of soot burning?
a C8H18
b CH3CHO
c CH3COOC2H5
d C5H11OH
orange precipitatecarbonyl derivative of 2,4 -DNPH
+ propanone+ propanal
http://www.absoluteastronomy.com/topics/Fehling's_solution
Ketones do not react with Fehlings solution
This is usually called the silver mirror test! We will do this next week
+ Na
Na H2
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