Carboxylic Acids

Question 1

Reaction with reactive metals

Answer 1

Reagents: reactive metal, R.T
Type of reaction: redox
A salt and hydrogen is produced

Question 2

Reaction with alkali

Answer 2

Reagent: alkali, R.T
Type of reaction: neutralisation
A salt and water is produced

Question 3

Reaction with metal carbonate

Answer 3

Reagent: metal carbonate, R.T
Type of reaction: redox
A salt, water and carbon dioxide is formed

Question 4

Reaction with alcohol

Answer 4

Reagent: alcohol
Condition: concentrated H2SO4 (catalyst)
Type of reaction: Condensation
An ester and water is produced

Question 5

Reduction of carboxylic acids

Answer 5

Reagent: LiAlH4, R.T
An alcohol and water is produced

Question 6

Carboxylic acid -> Acyl chloride

Answer 6

Reagent: PCl3, heat or PCl5 or SOCl2

Question 7

Oxidation of methanoic acid

Answer 7

Reagent: K2Cr2O7/H+ or KMnO4/H+ or Tollens reagent or Fehlings solution
Carbon dioxide and water are produced

Question 8

Oxidation of ethanedioic acid

Answer 8

Reagent: KMnO4/H+ , heat
Carbon dioxide and water is produced

Question 9

Reactions that produce carboxylic acids (3)

Answer 9

1) Oxidation of primary alcohols and aldehydes
2) Hydrolysis of nitriles
3) Hydrolysis of esters