Two simple rules to remember carboxylic acids:
- Functional group = -COOH (carboxyl group)
- Naming = same prefix as alkane + "-anoic acid" ending
Meth-anoic, Eth-anoic, Prop-anoic, But-anoic acid
Test for carboxylic acids: Add sodium carbonate — "If it fizzes, it's an acid". The fizzing is CO₂ being produced.
Oxidation pathway: Alcohol → [oxidise] → Carboxylic Acid. Think: wine (ethanol) + air (oxygen) → vinegar (ethanoic acid). Oxidation goes UP the functional group "ladder".
This memory aid covers Memory Aid: -COOH = Acid, -anoic acid Ending 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 12 of 15 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Practice questions for Carboxylic Acids
What is the functional group present in all carboxylic acids?
Explain why carboxylic acids are described as weak acids.