Gce Model Questions Vol1 2018 Chemistry Question 48

Practice objective / multiple choice question 48 from the 2018 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Medium Difficulty
Question 48 GCE_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Consider the redox reaction between iron(III) ions and solid copper: \(\mathrm{Fe^{3+}+Cu(s)\rightarrow Fe^{2+}+Cu^{2+}}\). Standard reduction potentials are \(E^{\circ}(\mathrm{Fe^{3+}/Fe^{2+}})=+0.77\ \text{V}\) and \(E^{\circ}(\mathrm{Cu^{2+}/Cu})=+0.34\ \text{V}\).\n\n(a) Calculate the standard cell potential \(E^{\circ}_{\text{cell}}\).\n(b) Determine the equilibrium constant \(K\) at 25 °C.\n(c) If 0.010 mol of \(\mathrm{Fe^{3+}}\) is placed in 1.00 L of solution with excess copper metal, calculate the equilibrium concentration of \(\mathrm{Fe^{2+}}\) ions.

Answer Options

A. E°=0.43 V; K=3.4\times10^{14}; [Fe^{2+}]\approx0.020\ \text{M}
B. E°=0.43 V; K=1.2\times10^{12}; [Fe^{2+}]\approx0.005\ \text{M}
Correct Answer C. E°=0.43 V; K=3.4\times10^{14}; [Fe^{2+}]\approx0.010\ \text{M}
D. E°=0.11 V; K=3.4\times10^{14}; [Fe^{2+}]\approx0.010\ \text{M}
Correct Answer
C
Correct Option:
E°=0.43 V; K=3.4\times10^{14}; [Fe^{2+}]\approx0.010\ \text{M}

About This Question

This is Gce Model Questions Vol1 2018 Chemistry Question 48. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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