Revision on alcohol,carboxylic acid and ester

basic concept on alcohols, carboxylic acids and ester

1. Revision on alcohols, carboxylic
acids and ester

2. Change of one
homologous series to
another homologous
series

9. Alcohol
Carboxylic
acid
Ester
State the general formula for

10. Many reactions of ethanol

11. Reaction 1
•Combustion
•ethanol is burnt in excess oxygen
Observation: ethanol burns with blue
flame, no soot

12. Reaction 2
•Dehydration
•ethanol is passed over heated
porcelain chips to produce ethene
Observation: gas formed that will
decolorize brown bromine water

13. Reaction 3
•hydration or addition of steam
•When a mixture of ethene and steam is
heated over phosphoric acid as
catalyst, temp of 300
o
C, pressure 60
atm.

14. 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

15. 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

16. Reaction 6
•Oxidation
•When ethanol is warmed with acidified
potassium dichromate as oxidizing agent
Observation:Orange solution change to green

17. Naming of esters