Question

Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some half-cell reactions and their standard potentials are given below:

MnO₄⁻ (aq) + 8H⁺ (aq) + 5e⁻ → Mn²⁺ (aq) + 4H₂O(l); E° = 1.51 V

Cr₂O₇²⁻ (aq) + 14H⁺ (aq) + 6e⁻ → 2Cr³⁺ (aq) + 7H₂O(l); E° = 1.38 V

Fe³⁺ (aq) + e⁻ → Fe²⁺ (aq); E° = 0.77 V

Cl₂ (g) + 2e⁻ → 2Cl⁻ (aq); E° = 1.40 V

Identify the only incorrect statement regarding the quantitative estimation of aqueous Fe(NO₃)₂