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Question
Give a chemical test to distinguish between ethanal acid and ethanoic acid.
Solution
Sodium carbonate test: Ethanal does not react with metal carbonates like sodium carbonates, whereas ethanoic acid does, forming salt, water, and CO2. Effervescence will be detected in this reaction.
For example:
\[\ce{2CH3COOH + Na2CO3 -> 2CH3COONa + CO2 ^ + H2O}\]
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