AQA · Chemistry · 8462
GCSE Chemistry: Carboxylic acids
Organic chemistry · AQA GCSE Chemistry (8462), specification point 4.7.2.4. Cards are generated from the exam board's own specification for "Carboxylic acids", and every card links back to the page it came from. Separate science only. Specification © AQA — used with attribution.
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What is the functional group of a carboxylic acid?
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–COOH.
The first member of the carboxylic acid homologous series is ? acid.
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methanoic
Name the carboxylic acid with two carbon atoms.
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Ethanoic acid (CH3COOH).
Name the carboxylic acid with four carbon atoms.
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Butanoic acid.
What is the molecular formula of ethanoic acid?
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CH3COOH.
Which gas is produced when a carboxylic acid reacts with a carbonate?
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Carbon dioxide (along with a salt and water).
What type of solution forms when a carboxylic acid dissolves in water?
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A weakly acidic solution — the acid only partially ionises, releasing some H+ ions.
What type of compound forms when a carboxylic acid reacts with an alcohol?
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An ester (plus water).
Which ester forms when ethanoic acid reacts with ethanol?
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Ethyl ethanoate.
Why are carboxylic acids classed as weak acids?
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They only partially ionise in water, so few H+ ions are released and the pH is higher than a strong acid of the same concentration.
Carboxylic acids are ? acids because they only partially ionise in water.
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weak
What is the name ending shared by all carboxylic acids?
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-oic acid (e.g. propanoic acid).
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