Chemistry 5070 · O Level · Carboxylic acids

Carboxylic acids — practice question

Fig. 8.1 presents the displayed formula for an unsaturated carboxylic acid, X: $CH_3CH=CHCOOH$.
(a)[1]

Explain why X is unsaturated.

(b)[2]

Describe the observations when X reacts with aqueous bromine.

(c)[1]

X is a weak acid. Describe the meaning of the term weak in weak acid.

(d)[1]

X reacts with aqueous sodium carbonate. Name the gas formed in this reaction.

(e)[2]

Describe how an ester is prepared from X.

(f(i))[1]

Ethanoic acid is a saturated carboxylic acid. Describe how ethanoic acid is made from ethanol.

(f(ii))[1]

Dilute ethanoic acid reacts with aqueous sodium hydroxide. Name the two products of this reaction.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: has a double bond between carbon atoms / contains a C=C bond

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI