Neco Model Questions Vol1 2021 Chemistry Question 21
Practice objective / multiple choice question 21 from the 2021 Neco Model Questions Vol1 Chemistry examination.
In a galvanic cell at 298 K the following half‑cells are used: \( \mathrm{Fe^{3+}}(0.20\ \text{M})/\mathrm{Fe^{2+}}(\text{unknown})/\mathrm{Fe(s)} \) and \( \mathrm{Cu^{2+}}(0.10\ \text{M})/\mathrm{Cu(s)} \). The standard reduction potentials are \( E^{\circ}(\mathrm{Fe^{3+}/Fe^{2+}}) = +0.77\ \text{V} \) and \( E^{\circ}(\mathrm{Cu^{2+}/Cu}) = +0.34\ \text{V} \). The measured cell potential is \( 0.40\ \text{V} \). Determine the concentration of \( \mathrm{Fe^{2+}} \) in the solution.
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This is Neco Model Questions Vol1 2021 Chemistry Question 21. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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