This exam focus covers Exam Focus: Carboxylic Acids within Carboxylic Acids for GCSE Chemistry. Revise Carboxylic Acids in Organic Chemistry for GCSE Chemistry with 22 exam-style questions and 15 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 13 of 15 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
🎯 Exam Focus: Carboxylic Acids
very-high Identification test (2 marks): Describe the carbonate test — state reagent (sodium carbonate), observation (fizzing), gas test (limewater goes milky), conclusion (carboxylic acid identified).
high Weak acid explanation (2 marks): Must say "partially dissociates" and use ⇌ symbol in any dissociation equation.
high Naming and formula (1-2 marks): Use "-anoic acid" ending; general formula CₙH₂ₙ₊₁COOH.
medium Ester formation (2 marks): Carboxylic acid + alcohol → ester + water (uses ⇌ — it's reversible).
Edexcel 1CH0: Examined in Paper 2 (1CH0/2). Reactions of carboxylic acids with alcohols (esterification) and with carbonates are tested in Edexcel Paper 2. In Edexcel-style questions, the command word "Suggest" appears frequently — use your chemistry knowledge to apply to an unfamiliar context.
Practice questions for Carboxylic Acids
What is the functional group present in all carboxylic acids?
Explain why carboxylic acids are described as weak acids.