Q:What gas escaped during the sodium bicarbonate washing? Write balanced equations for two reactions that took place du…
ID: 792783 • Letter: Q
Question
Experiment: Preparation of synthetic banana oil
Flow chat:
Reaction mixture: acetic acid,isopentyl alcohol,sulfuric acid
Step: reflux
Product mixture: isopentyl acetate,acetic acid*, isopentyl alcohol*,sulfuric acid,water,by-products
(*=unreacted starting materials)
Step:wash
AQ layer: water,acetic acid and sulfuric acid as salts
organic layer: isopentyl acetate, isopenty alcohol, water (trace), by-products
Experiment: Preparation of synthetic banana oil
Flow chat:
Reaction mixture: acetic acid,isopentyl alcohol,sulfuric acid
Step: reflux
Product mixture: isopentyl acetate,acetic acid*, isopentyl alcohol*,sulfuric acid,water,by-products
(*=unreacted starting materials)
Step:wash
AQ layer: water,acetic acid and sulfuric acid as salts
organic layer: isopentyl acetate, isopenty alcohol, water (trace), by-products
Experiment: Preparation of synthetic banana oil
Flow chat:
Reaction mixture: acetic acid,isopentyl alcohol,sulfuric acid
Step: reflux
Product mixture: isopentyl acetate,acetic acid*, isopentyl alcohol*,sulfuric acid,water,by-products
(*=unreacted starting materials)
Step:wash
AQ layer: water,acetic acid and sulfuric acid as salts
organic layer: isopentyl acetate, isopenty alcohol, water (trace), by-products
Explanation / Answer
The gas that escaped is carbon dioxide, CO2.
Sodium bicarbonate reacts with the unreacted acetic acid and sulfuric acid:
(1) NaHCO3(aq) + CH3COOH(aq) => CH3COONa(aq) + CO2(g) + H2O(l)
(2) 2 NaHCO3(aq) + H2SO4(aq) => Na2SO4(aq) + 2 CO2(g) + 2 H2O(l)
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