revision on alcohol,carboxylic acid and ester
DESCRIPTION
basic concept on alcohols, carboxylic acids and esterTRANSCRIPT
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Revision on alcohols, carboxylic acids and ester
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Change of one homologous series to another homologous
series
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Alcohol
Carboxylic acid
Ester
State the general formula for
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Many reactions of ethanol
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Reaction 1
• Combustion• ethanol is burnt in excess oxygen
Observation: ethanol burns with blue flame, no soot
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Reaction 2
• Dehydration • ethanol is passed over heated
porcelain chips to produce ethene
Observation: gas formed that will decolorize brown bromine water
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Reaction 3
• hydration or addition of steam• When a mixture of ethene and steam is
heated over phosphoric acid as catalyst, temp of 300oC, pressure 60 atm.
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Reaction 4
• Esterification • When a mixture of ethanol and
ethanoic acid is warmed with conc sulphuric acid as catalyst, Observation: sweet smelling liquid is formed
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Reaction 5
• Esterification • When a mixture of ethanoic acid and
ethanol is warmed with conc sulphuric acid as catalyst
Observation: Sweet smelling liquid is formed
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Reaction 6
• Oxidation • When ethanol is warmed with acidified
potassium dichromate as oxidizing agent
Observation: Orange solution change to green
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Naming of esters