CAIE A Level Chemistry 9701 · Carboxylic acids and derivatives
Chloroethanoic acid, dichloroethanoic acid and trichloroethanoic acid are all stronger acids than ethanoic acid. Compare the acidities of these four acids, and explain the trend in terms of the inductive effect of the chlorine atoms.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.