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-4aq-8H-aq-6e- Mn2-a q-4 H2Ol E-1-51 V Cr2O72-a q-14 H-a q-6 e- 2 Cr3-a q-7 H2Ol - E-1 - 38 V Fe3-a q-e-Fe2-a q - E-0-77 V Cl2g-2 e- 2 Cl-a q - E-1 - 40 VIdentify the only incorrect statement regarding the quantitative estimation of aqueous FeNO32

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Redox Reactions and Couple

Standard elec...

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: $M n O_{4}^{-} (a q) + 8 H^{+} (a q) + 6 e^{-} ⟶$ ${M n}^{2 +} (a q) + 4 H_{2} O (l) E^{\circ} = 1.51 V$
${C r}_{2} O_{7}^{2 -} (a q) + 14 H^{+} (a q) + 6 e^{-} ⟶$ $2 {C r}^{3 +} (a q) + 7 H_{2} O (l); E^{\circ} = 1 \cdot 38 V$
${F e}^{3 +} (a q) + e^{-} ⟶ {F e}^{2 +} (a q); E^{\circ} = 0.77 V$
${C l}_{2} (g) + 2 e^{-} \to 2 {C l}^{-} (a q); E^{\circ} = 1 \cdot 40 V$
Identify the only incorrect statement regarding the quantitative estimation of aqueous
$F e {({N O}_{3})}_{2}$

{M n O}_{4}^{-}

can be used in aqueous

H C l

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{C r}_{2} O_{7}^{2 -}

can be used in aqueous

H C l

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{M n O}_{4}^{-}

can be used in aqueous

H_{2} {S O}_{4}

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{C r}_{2} O_{7}^{2 -}

can be used in aqueous

H_{2} {S O}_{4}

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M n O_{4}^{-} (a q) + 8 H^{+} (a q) + 5 e^{-} \to M n^{2 +} (a q) + 4 H_{2} O (I); E^{\circ} = 1.51 V

C r_{2} O_{7}^{2 -} (a q) + 14 H^{+} (a q) + 6 e^{-} \to 2 C r^{3 +} (a q) + 7 H_{2} O (I); E^{\circ} = 1.38 V

F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{\circ} = 0.77 V

C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q); E^{\circ} = 1.40 V

F e (N O_{3})_{2}

M n O_{4}^{-} (a q .) + 8 H^{+} (a q .) + 5 e^{-} \to M n^{2 +} (a q .) + 4 H_{2} O (l); E^{o} = 1.51 V

C r_{2} O_{7}^{2 -} (a q .) + 14 H^{+} (a q .) + 6 e^{-} \to 2 C r^{3 +} (a q .) + 7 H_{2} O (l); E^{o} = 1.38 V

F e^{3 +} (a q .) + e^{-} \to F e^{2 +} (a q .); E^{o} = 0.77 V

C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q .); E^{o} = 1.40 V

F e (N O_{3})_{2}

M n_{4}^{-} (a q) + 8 H^{+} (a q) + 5 e^{-} \to M n^{2 +} (a q) + 4 H_{2} O (l); E^{\circ} = 1.51 V

C r_{2} O_{7}^{2 -} (a q) + 14 H^{+} + 6 e^{-} \to 2 C r^{3} + (a q) + 7 H_{2} O (l); E^{\circ} = 138 V

F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{\circ} = 0.77 V

C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q); E^{\circ} = 1.40 V

F e (N O_{3})_{2}

M n O_{4}^{-} (a q .) + 8 H^{+} (a q .) + 5 e^{-} \to M n^{2 +} (a q .) + 4 H_{2} O (l); E^{\circ} = 1.51 v o l t

C r_{2} O_{7}^{2 -} (a q .) + 14 H^{+} (a q .) + 6 e^{-} \to 2 C r^{3 +} (a q .) + 7 H_{2} O (l)^{'} E^{\circ} = 1.38 v o l t

F e^{3 +} (a q .) + e^{-} \to F e^{2 +} (a q .); E^{\circ} = 0.77 v o l t

C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q .); E^{\circ} = 1.40 v o l t

F e (N O_{3})_{2}

C r_{2} O_{7}^{2 -} (a q) + 14 H^{\oplus} (a q) + 6 e^{-} \to 2 C r^{3 +} (a q) + 7 H_{2} O

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