engineering chemistry MCQ #2771

For the cell reaction: 2Fe³⁺ + 2I⁻ → 2Fe²⁺ + I₂, E⁰_cell = 0.236 V at 298 K. The equilibrium constant is

engineering chemistry MCQ #2771

  1. Question 1

    Q1. For the cell reaction: 2Fe³⁺ + 2I⁻ → 2Fe²⁺ + I₂, E⁰_cell = 0.236 V at 298 K. The equilibrium constant is

    • A) 9.69 × 10⁷
    • B) 9.69 × 10⁻⁸
    • C) 1.03 × 10⁸
    • D) 1.03 × 10⁻⁸

    Answer: 9.69 × 10⁷

    Explanation: Using log Kc = nE⁰ / 0.0591, where n = 2, E⁰ = 0.236 V, we get log Kc = 7.987, so Kc = 9.69 × 10⁷.