Gce Model Questions Vol1 2025 Chemistry Question 25

Practice objective / multiple choice question 25 from the 2025 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Hard Difficulty
Question 25 GCE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

The esterification of benzoic acid with ethanol follows the equilibrium\n\(\text{C}_6\text{H}_5\text{COOH} + \text{C}_2\text{H}_5\text{OH} \rightleftharpoons \text{C}_6\text{H}_5\text{COOC}_2\text{H}_5 + \text{H}_2\text{O}\)\nwith an equilibrium constant \(K = 4.0\times10^{-3}\) at 25 °C (activities of water are taken as unity). In a 1.00 L flask, 0.50 mol of benzoic acid and 0.80 mol of ethanol are placed. Calculate (a) the equilibrium concentration of ethyl benzoate, and (b) the percentage conversion of benzoic acid to ester.

Answer Options

A. 5.0×10⁻⁴ mol L⁻¹; 0.10 %
B. 1.0×10⁻³ mol L⁻¹; 0.20 %
Correct Answer C. 1.3×10⁻³ mol L⁻¹; 0.25 %
D. 2.0×10⁻³ mol L⁻¹; 0.40 %
Correct Answer
C
Correct Option:
1.3×10⁻³ mol L⁻¹; 0.25 %

About This Question

This is Gce Model Questions Vol1 2025 Chemistry Question 25. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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