February/March 2026 Paper 22

2026 · 40 questions · 40 parts · 40 marks

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29Carboxylic Acids EstersMedium1 mark
The displayed formula of butanoic acid is shown.
displayed formula of butanoic acid: a chain of three carbon atoms each bonded to hydrogens, ending in a carbon double-bonded to O and single-bonded to O-H
Butanoic acid reacts with ethanol to form an ester. What is the structural formula and the empirical formula of the ester?
structural formulaempirical formula
ACHCOOCHCHO
BCHCOOCHCHO
CCHCOOCHCHO
DCHCOOCHCHO