Gce Model Questions Vol1 2025 Chemistry Question 4
Practice objective / multiple choice question 4 from the 2025 Gce Model Questions Vol1 Chemistry examination.
In acidic solution the following redox process occurs: \( \mathrm{MnO_4^- + C_2O_4^{2-} \rightarrow Mn^{2+} + CO_2} \). The standard reduction potentials are \( E^\circ(\mathrm{MnO_4^- / Mn^{2+}}) = +1.51\ \text{V} \) and \( E^\circ(\mathrm{C_2O_4^{2-} / CO_2}) = +0.49\ \text{V} \). (a) Balance the overall redox equation. (b) Calculate the standard cell potential \( E^\circ_{\text{cell}} \). (c) If the reaction is carried out at 25 °C with concentrations \([ \mathrm{MnO_4^-} ] = 0.010\ \text{M}\), \([ \mathrm{C_2O_4^{2-}} ] = 0.020\ \text{M}\), and \([ \mathrm{H^+} ] = 0.100\ \text{M}\), determine the cell potential using the Nernst equation (assume all other species have unit activity).
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This is Gce Model Questions Vol1 2025 Chemistry Question 4. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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