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CAIE A-Level Chemistry 18.1.2 Reactions of Carboxylic Acids

Practise equations for acid–base, metal, carbonate, esterification and LiAlH4 reduction reactions of carboxylic acids.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • form carboxylate salts with reactive metals, alkalis or carbonates and balance H2 or CO2 production
  • form an ester with an alcohol using concentrated H2SO4 catalyst and heat
  • reduce –COOH to –CH2OH with LiAlH4, accounting for the oxygen removed and water where equations require

18.1.2—Describe question 1

[Maximum number: 2]

Allyl chloride is an important chemical used in the manufacture of plastics, pharmaceuticals and pesticides.

allyl chloride

allyl chloride

A series of reactions starting from allyl chloride is shown.

Figure for Question 18.1.2—Describe question 1 — CAIE A-Level Chemistry AS

In reaction 2, the organic product of reaction 1 is mixed with concentrated H2SO4\mathrm{H}_{2} \mathrm{SO}_{4} and an organic acid, and then heated under reflux.

State the role of the concentrated H2SO4\mathrm{H}_{2} \mathrm{SO}_{4}. Identify the organic acid used.
role of the concentrated H2SO4\mathrm{H}_{2} \mathrm{SO}_{4}
identity of the organic acid

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