Q67 · Practice questionComplex familiar4 marks
QUESTION 67 (4 marks)
Ethyl propanoate is warmed with dilute acid and excess water.
a) Write a balanced equation for the organic reaction. [2 marks]
b) Explain why excess water favours the products. [1 marks]
c) Name and classify this reaction. [1 marks]
WORKED SOLUTION
4 marksPractice marking scheme
; acid-catalysed ester hydrolysis.
Hydrolysis reverses esterification, producing propanoic acid and ethanol. Added water is a reactant and shifts the equilibrium towards hydrolysis products.
- Identifies correct acid and alcohol. [1 marks]
- Balances equation including water/reversibility. [1 marks]
- Uses Le Châtelier to explain added-water effect. [1 marks]
- Names ester hydrolysis. [1 marks]
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