Neco 2021 Chemistry Question 33

Practice objective / multiple choice question 33 from the 2021 Neco Chemistry examination.

Neco 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 33 NECO • 2021 • CHEMISTRY • objective

Consider a galvanic cell constructed from the half‑cells \(\mathrm{Fe^{3+} + e^- \rightarrow Fe^{2+}}\) \((E^\circ = +0.77\ \text{V})\) and \(\mathrm{Cu^{2+} + 2 e^- \rightarrow Cu}\) \((E^\circ = +0.34\ \text{V})\). The cell contains \(0.010\ \text{M}\) \(\mathrm{Fe^{3+}}\), \(0.10\ \text{M}\) \(\mathrm{Fe^{2+}}\) and \(0.050\ \text{M}\) \(\mathrm{Cu^{2+}}\) at \(25^{\circ}\text{C}\). (a) Write the overall cell reaction as it proceeds spontaneously. (b) Calculate the cell potential using the Nernst equation and state whether the reaction is spontaneous as written.

Answer Options

Correct Answer A. E ≈ 0.41 V; the reaction as written is spontaneous
B. E ≈ 0.55 V; the reaction as written is spontaneous
C. E ≈ -0.41 V; the reaction as written is non‑spontaneous
D. E ≈ 0.23 V; the reaction as written is non‑spontaneous
Correct Answer
A
Correct Option:
E ≈ 0.41 V; the reaction as written is spontaneous

About This Question

This is Neco 2021 Chemistry Question 33. It is one of the objective questions from the 2021 Neco Chemistry examination.

Difficulty level: Medium .

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