MHT CET Chemistry 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 \mathrm{MnO_4^-(aq) + 8H^+(aq) + 5e^- \to Mn^{2+}(aq) + 4H_2O(l)};\ E^\circ = 1.51 V \mathrm{Cr_2O_7^{2-}(aq) + 14H^+(aq) + 6e^- \to 2Cr^{3+}(aq) + 7H_2O(l)};\ E^\circ = 1.38 V \mathrm{Fe^{3+}(aq) + e^- \to Fe^{2+}(aq)};\ E^\circ = 0.77 V V Identify the incorrect statement regarding the quantitative estimation of aqueous .
Answer: (A)
Solution
( = 1.51 V) is a stronger oxidant than (1.40 V) so it would also oxidise of HCl and give wrong results, making (a) incorrect;
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