Neco Model Questions Vol1 2023 Chemistry Question 42
Practice objective / multiple choice question 42 from the 2023 Neco Model Questions Vol1 Chemistry examination.
Consider the redox reaction between permanganate ion and ferrous ion in acidic solution: \( \mathrm{MnO_4^- + 5 Fe^{2+} + 8 H^+ \rightarrow Mn^{2+} + 5 Fe^{3+} + 4 H_2O}\). The standard reduction potentials are \(E^\circ_{\mathrm{MnO_4^- / Mn^{2+}}}=+1.51\ \text{V}\) and \(E^\circ_{\mathrm{Fe^{3+} / Fe^{2+}}}=+0.77\ \text{V}\). At 298 K, the concentrations are \([\mathrm{MnO_4^-}]=0.020\ \text{M},\ [\mathrm{Mn^{2+}}]=0.001\ \text{M},\ [\mathrm{Fe^{2+}}]=0.010\ \text{M},\ [\mathrm{Fe^{3+}}]=0.10\ \text{M}\). Calculate the cell potential \(E_{\text{cell}}\) under these conditions.
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This is Neco Model Questions Vol1 2023 Chemistry Question 42. It is one of the objective questions from the 2023 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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