Waec Model Questions Vol1 2025 Chemistry Question 15

Practice objective / multiple choice question 15 from the 2025 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Hard Difficulty
Question 15 WAEC_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

In a 1.00 L flask at 25 °C, 0.500 mol of acetic acid (CH₃COOH) is mixed with 0.500 mol of ethanol (CH₃CH₂OH). They undergo esterification: CH₃COOH + CH₃CH₂OH ⇌ CH₃COOCH₂CH₃ + H₂O, with an equilibrium constant Kc = 4.0 at this temperature. Assuming ideal behaviour, (a) determine the equilibrium concentration of ethyl acetate, and (b) calculate the percent conversion of acetic acid.

Answer Options

A. Equilibrium [ethyl acetate] = 0.200 M; percent conversion of acetic acid = 40.0 %
B. Equilibrium [ethyl acetate] = 0.400 M; percent conversion of acetic acid = 80.0 %
Correct Answer C. Equilibrium [ethyl acetate] = 0.333 M; percent conversion of acetic acid = 66.7 %
D. Equilibrium [ethyl acetate] = 0.250 M; percent conversion of acetic acid = 50.0 %
Correct Answer
C
Correct Option:
Equilibrium [ethyl acetate] = 0.333 M; percent conversion of acetic acid = 66.7 %

About This Question

This is Waec Model Questions Vol1 2025 Chemistry Question 15. It is a objective / multiple choice question from the 2025 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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