Drawing and naming the carboxylic acids
2 marks · EasyGive the name of the unbranched carboxylic acid with the molecular formula .
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propanoic acid
Common mistakes: butanoic acid; ethanoic acid
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Marking points
M1 · 1 mark · Counts 3 carbons (topic notes that all in formula, including COOH, are counted).
A1 · 1 mark · Gives correct name: propanoic acid.
Worked solution
Count the carbons: has three carbons, so the acid is propanoic acid.