Drawing and naming the carboxylic acids

2 marks · Normal

Give the molecular formula and the displayed formula for butanoic acid.

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

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Must show: C4H8O2, displayed formula showing all COOH bonds

Also accept: Displayed formula as a correct bond-level drawing

Common mistakes: Wrong number of carbons or hydrogens; Only giving CH3CH2CH2COOH

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Marking points

B1 · 1 mark · Correct molecular formula: C4H8O2

B2 · 1 mark · Displayed formula drawn: all bonds in COOH group shown

Worked solution

Molecular formula: C4H8O2.

Displayed formula: H H H O | | | || H−C−C−C−C−O−H | | H H