1. ORGANIC ACID Carboxylic acid Alkanoic acid or

2. At the end of the lesson, pupils should be able to name, write and draw first four members of the alkanoic acid group describe the formation of ethanoic acid by oxidation of ethanol describe ethanoic acid as an acid describe the reaction of ethanoic acid with ethanol

3. Carboxylic acid(alkanoic acid) FORMATION OF ETHANOIC ACID ESTER FORMATION NAME MOLECUAR FORMULA STRUCTURAL FORMULA USES

4. Alkanoic acid General formula - C n H 2n+1 COOH Functional Group

5. C H H H H H O O CC H H H Alkane C n H 2n+2 Alkanoic acid C n H 2n+1 COOH methane H O O C H Methanoic acid C H H H C H H C H H H ethane Ethanoic acid C H H H C H H H propane C H H H H O O CC H H Propanoic acid

6. C H H H C H H H C H H C H H C H H H O O CC H H C H H H butane Butanoic acid

7. Chemical Properties Ethanoic acid are weak acids It has sour taste and soluble in water It is poor conductor of electricity

8. It reacts with a base to form salt and water Ethanoate Ethanoic acid Calcium + water Calcium oxide + 2CH 3 COOH CaO + Ca(CH 3 COO) 2 H 2 O +

9. It reacts with a carbonate to give carbon dioxide 2CH 3 COOH CuCO 3 + Cu(CH 3 COO) 2 + H 2 O CO 2 + Ethanoate Ethanoic acid Copper + water Copper carbonate + Carbon dioxide +

10. It reacts with a reactive metal to give hydrogen 2CH 3 COOH Na + CH 3 COONa + H 2 Ethanoate Ethanoic acid Sodium + hydrogen Sodium +

11. Oxidation of alcohol by the action of atmospheric oxidation 2C 2 H 5 OH CH 3 COOH Ethanoic acid Ethanol O2O2 Formation

12. Chemical oxidation 2C 2 H 5 OH CH 3 COOH Ethanoic acid Ethanol O2O2 Formation K 2 Cr 2 O 7 Acidified Potassium dichromate –oxidation agent

13. Ethanoic acid reacts with ethanol to form eater and water Ethyl Ethanoate Ethanol Ester formation water Ethanoic acid H O O CC H H H H O H CC H H H H + + O O CC H H H H CC H H H H H 2 O + +

14. Ester are sweet smelling compounds which are responsible for many fragnces in flowers and fruits eg bananas, oranges Characteristics of esters

15. 1. As preservatives eg vinegar 2. Manufacturing of esters 3. Making of others chemicals and drugs