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 :
MnO 4 – (aq.) + 8H + (aq.) + 5e – → Mn 2+ (aq.) + 4H 2 O( λ ) Eº = 1.51 V
Cr 2 O 7 2– (aq.) + 14H + (aq.) + 6e – → 2Cr 3+ (aq.) + 7H 2 O( λ ) Eº = 1.38 V
Fe 3+ (aq.) + e – → Fe 2+ (aq.) Eº = 0.77 V
Cl 2 (g) + 2e – → 2Cl – (aq.) Eº = 1.40 V
Identify the only INCORRECT statement regarding the quantitative estimation of aqueous Fe(NO 3 ) 2 :
Text Solution
Verified by ExpertsA
MnO 4 – ion can oxidise both Fe 2+ to Fe 3+ as well as Cl – to Cl 2 . So Fe(NO 3 ) 2 cannot be estimated quantitatively with MnO 4 – ion in HCl. Eº Cell for the cell Pt, Cl 2 (g) (1 atm) | Cl – (aq) | | MnO 4 – (aq) | Mn 2+ (aq). is euqal to (1.51 – 1.4) = 0.11 V.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems