Stand Alone Reactions Of Carboxylic acids

Question 1

Redox Reactions of Carboxylic Acids

Carboxylic Acid + Metal ->

2CH3CH2CHOOH (aq) + Mg(s)

Answer 1

-> carboxylate salt + H2

(CH3CH2COO-)_2 Mg2+ (aq) + H2(g)

Observations:

• effervescence
• metal disappears

Question 2

Neutralisation reactions of a Carboxylic Acid

CA + Metal Oxide ->

E.g. 2CH3CH2COOH (aq) + CaO(s)

Answer 2

-> salt (calcium ethanoate + H20

CH3CH2COO-)_2 Ca2+ (aq) + H2O(s

Question 3

Neutralisation of Carboxylic Acids

CA + Metal Carbonates ->

E.g. 2CH3COOH (aq) +Na2CO3 ->

Answer 3

-> 2CH3COO-Na+ + H20 + CO2
Carboxylate salt^

• effervescence seen as the CO2 is evolved, can use the limewater test for CO2
• if CA in excess then you see solid carbonate disappear

Question 4

Neutralisation of Carboxylic Acids

CA + Alkali
CH3COOH(aq) + NaOH(aq) ->

Answer 4

• > carboxylate salt + H20
• > CH3COO-Na+ (aq) + H20(l)
• very similar to the reaction of the amino acid + Naoh reaction
• might not see the reaction as you’re reacting 2 solutions to make another…solution