📖 Theory

Aim: To synthesize ethyl ethanoate (an ester) by refluxing ethanol with ethanoic acid in the presence of an acid catalyst.

Reaction: CH₃COOH + C₂H₅OH ⇌ CH₃COOC₂H₅ + H₂O

Catalyst: Concentrated H₂SO₄ (dehydrating agent and catalyst)

Key: This is a reversible reaction — reflux ensures maximum yield. The ester is separated by distillation and purified by washing with sodium carbonate solution.

🔮 Predict before you start

Procedure

⚠️ Safety
  • Concentrated H₂SO₄ is corrosive and mixes exothermically — add it slowly with cooling, wear goggles and gloves.
  • Ethanol and the ester product are highly flammable — heat with an electric hotplate/heating mantle, never a naked flame.
  • Use anti-bumping granules and never seal the apparatus — trapped vapour pressure is dangerous.
  • The Na₂CO₃ wash releases CO₂ — vent the separating funnel frequently. Ester vapours are an irritant; work in good ventilation.
Condenser Hot plate Step 1: Mix Reactants Add ethanol + ethanoic acid + conc. H₂SO₄ to flask Product
Lab Notebook
Follow the procedure steps...