Reaction with Carbonates

AQA A-level ChemistryCarboxylic Acids and DerivativesLesson 4 of 16

Carboxylic acids are strong enough acids to react with carbonates and hydrogencarbonates, forming a salt, water and carbon dioxide. You see effervescence (fizzing), and the gas turns limewater cloudy.

2CH₃COOH + Na₂CO₃ → 2CH₃COONa + H₂O + CO₂
CH₃COOH + NaHCO₃ → CH₃COONa + H₂O + CO₂

The ionic equation for the carbonate reaction is:

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Reaction with Carbonates

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