revision on alcohol,carboxylic acid and ester
DESCRIPTION
basic concept on alcohols, carboxylic acids and esterTRANSCRIPT
Revision on alcohols, carboxylic acids and ester
Change of one homologous series to another homologous
series
Alcohol
Carboxylic acid
Ester
State the general formula for
Many reactions of ethanol
Reaction 1
• Combustion• ethanol is burnt in excess oxygen
Observation: ethanol burns with blue flame, no soot
Reaction 2
• Dehydration • ethanol is passed over heated
porcelain chips to produce ethene
Observation: gas formed that will decolorize brown bromine water
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.
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
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
Reaction 6
• Oxidation • When ethanol is warmed with acidified
potassium dichromate as oxidizing agent
Observation: Orange solution change to green
Naming of esters