Neco 2020 Chemistry Question 16

Practice objective / multiple choice question 16 from the 2020 Neco Chemistry examination.

Neco 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 16 NECO • 2020 • CHEMISTRY • objective
Neco 2020 Chemistry Question 16 diagram

An electrochemical cell is constructed with the following half‑cells at 298\,K:\n\nAnode (oxidation): Fe(s) \| Fe^{2+} (0.020\,M)\n\nCathode (reduction): Ag^{+} (0.050\,M) \| Ag(s)\n\nStandard reduction potentials are E°(Ag^{+}/Ag)=+0.80\,V and E°(Fe^{2+}/Fe)=\-0.44\,V.\n\nThe measured cell potential under these conditions is 1.15\,V. Assuming ideal behaviour and unit activity coefficients, determine (a) the standard cell potential E°_{cell}, and (b) the equilibrium constant K for the overall cell reaction at 298\,K.

Answer Options

Correct Answer A. E°_{cell}=1.18 V; K≈5.9×10^{39}
B. E°_{cell}=1.14 V; K≈1.1×10^{39}
C. E°_{cell}=1.18 V; K≈3.2×10^{38}
D. E°_{cell}=1.22 V; K≈2.3×10^{40}
Correct Answer
A
Correct Option:
E°_{cell}=1.18 V; K≈5.9×10^{39}

About This Question

This is Neco 2020 Chemistry Question 16. It is one of the objective questions from the 2020 Neco Chemistry examination.

Difficulty level: Medium .

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