Ijmb Model Questions Vol1 2018 Chemistry Question 9

Practice essay / theory question 9 from the 2018 Ijmb Model Questions Vol1 Chemistry examination. This question covers Redox Reactions .

Ijmb Model Questions Vol1 2018 Chemistry Essay / Theory
Topic: Redox Reactions
Question 9 IJMB_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • essay

The following redox process occurs in an acidic aqueous solution: Fe²⁺ (aq) + MnO₄⁻ (aq) → Fe³⁺ (aq) + Mn²⁺ (aq) Standard reduction potentials (E°) at 25 °C are: MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O  E° = +1.51 V Fe³⁺ + e⁻ → Fe²⁺  E° = +0.77 V Answer the following questions:

Question Parts

( a )
Write the two half‑reactions (oxidation and reduction) that occur in the overall process, showing the correct direction for each half‑reaction in acidic medium.
( b )
Balance the overall redox equation in acidic solution.
( c )
Using the standard potentials given, calculate: (i) the standard cell potential (E°cell); (ii) whether the reaction is spontaneous under standard conditions; (iii) the equilibrium constant (K) at 298 K. (Use the relation ΔG° = –nFE° and ΔG° = –RT ln K, with R = 8.314 J mol⁻¹ K⁻¹, F = 96485 C mol⁻¹.)

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About This Question

This is Ijmb Model Questions Vol1 2018 Chemistry Question 9. It is one of the essay questions from the 2018 Ijmb Model Questions Vol1 Chemistry examination.

The question covers Redox Reactions .

View More Ijmb Model Questions Vol1 2018 Chemistry Questions More Ijmb Model Questions Vol1 Practice Questions Back to Questions

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