Anaerobic fermentation of sugars by certain bacteria produces butanoic acid, CH3CH2CH2COOH\text{CH}_3\text{CH}_2\text{CH}_2\text{COOH}CH3CH2CH2COOH, which is responsible for the sharp, unpleasant odour of rancid butter.
Draw the fully displayed structure of a molecule of butanoic acid, showing all atoms and all covalent bonds.
Practise Edexcel GCSE Chemistry Alcohols and carboxylic acids with exam-style questions for Foundation and Higher tier. 55 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
