Redox and Equivalent ConceptEasy
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
Options
A.MnO4− can be used in aqueous HCl
B.Cr2O72− can be used in aqueous HCl
C.MnO4− can be used in aqueous H2SO4
D.Cr2O72− can be used in aqueous H2SO4
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