Gce Model Questions Vol1 2017 Chemistry Question 45

Practice objective / multiple choice question 45 from the 2017 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Hard Difficulty
Question 45 GCE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

At \(25^{\circ}\mathrm{C}\) the esterification of acetic acid with ethanol reaches equilibrium with an equilibrium constant \(K_{\mathrm{eq}}=4.0\times10^{-2}\) for the reaction \(\mathrm{CH_3COOH + C_2H_5OH \rightleftharpoons CH_3COOC_2H_5 + H_2O}\). If initially \(0.10\ \mathrm{mol}\) of each reactant are placed in a \(1.0\ \mathrm{L}\) flask, calculate (a) the equilibrium concentrations of all species and (b) the percentage conversion of acetic acid to ethyl acetate.

Answer Options

A. At equilibrium: [CH₃COOH]=[C₂H₅OH]=0.080 M, [CH₃COOC₂H₅]=[H₂O]=0.020 M; conversion ≈ 20 %
Correct Answer B. At equilibrium: [CH₃COOH]=[C₂H₅OH]=0.083 M, [CH₃COOC₂H₅]=[H₂O]=0.0167 M; conversion ≈ 16.7 %
C. At equilibrium: [CH₃COOH]=[C₂H₅OH]=0.085 M, [CH₃COOC₂H₅]=[H₂O]=0.015 M; conversion ≈ 15 %
D. At equilibrium: [CH₃COOH]=[C₂H₅OH]=0.090 M, [CH₃COOC₂H₅]=[H₂O]=0.010 M; conversion ≈ 10 %
Correct Answer
B
Correct Option:
At equilibrium: [CH₃COOH]=[C₂H₅OH]=0.083 M, [CH₃COOC₂H₅]=[H₂O]=0.0167 M; conversion ≈ 16.7 %

About This Question

This is Gce Model Questions Vol1 2017 Chemistry Question 45. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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