Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration- Some half - cell reactions and their standared poteintials are given below- MnO - 4 - aq -8 H - aq -5 e - Mn -2- aq -4 H - 2 O l - - - E -circ-1-51 - V Cr - 2 O - 7 -2- aq -14 H - aq -6 e - rightarrow 2 Cr -3- aq- -7 H - 2 O 1 - - - E -circ-1-38 - V Fe -3- aq - e - rightarrow Fe -2- aq - - - - E - circ -0-77 - V IIdentify the only incorrect statement regarding the quantitative estimation of aqueous F e N O 32-A- MnO 4-can be used in aqueous HClB- Cr 2 O 72- can be used in aqueous HClC- MnO 4-can be used in aqueous H 2 SO 4D- Cr 2 O 72- can be used in aqueous H 2 SO 4

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Redox Reactions

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 standared poteintials are given below:

$M n O_{4}^{-} (a q) + 8 H^{+} (a q) + 5 e^{-} \to M n^{2 +} (a q) + 4 H_{2} O (l); E^{\circ} = 1.51 V C r_{2} O_{7}^{2 -} (a q .) + 14 H^{+} (a q .) + 6 e^{-} \to 2 C r^{3 +} (a q .) + 7 H_{2} O (l); E^{\circ} = 1.38 V F e_{(a q .)}^{3 +} + e^{-} \to F e^{2 +} (a q .); E^{\circ} = 0.77 V C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q .); E^{\circ} = 1.40 V$

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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Solution

The correct option is A $M n O_{4}^{-}$ can be used in aqueous $H C l$
$M n O_{4}^{-}$ cannot be used in quantitative estimation of $F e (N O_{3})$ in the presence of $H C l$ because $M n O_{4}^{-}$ willl also oxidise $C l^{-}$ to $C l_{2}$ .

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

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

Identify the only incorrect statement regarding the quantitative estimation of aqueous

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

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

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

Identify the only incorrect statement regarding the quantitative estimation of aqueous

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

Q. 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 .) + 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

Identity the only incorrect statement regarding the quantitative estimation of aqueous

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

Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox Titration. Some half – cell reactions and their standard potential are given below:
$M n O_{4}^{-} (a q) + 8 H^{+} (a q) + 5 e^{-} \to M n^{2 +} (a q) + 4 H_{2} O (I); E^{\circ} = 1.51 V$
$C r_{2} O_{7}^{2 -} (a q) + 14 H^{+} (a q) + 6 e^{-} \to 2 C r^{3 +} (a q) + 7 H_{2} O (I); E^{\circ} = 1.38 V$
$F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{\circ} = 0.77 V$
$C l_{2} (g) + 2 e^{-} \to 2 C l^{-} (a q); E^{\circ} = 1.40 V$

Identify the only incorrect statement regarding the quantitative estimation of aqueous $F e (N O_{3})_{2}$ .

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

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

Identify the only incorrect statement regarding the quantitative estimation of aqueous

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

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The correct option is A MnO−4 can be used in aqueous HClMnO−4 cannot be used in quantitative estimation of Fe(NO3) in the presence of HCl because MnO−4 willl also oxidise Cl− to Cl2.

The correct option is A $M n O_{4}^{-}$ can be used in aqueous $H C l$
$M n O_{4}^{-}$ cannot be used in quantitative estimation of $F e (N O_{3})$ in the presence of $H C l$ because $M n O_{4}^{-}$ willl also oxidise $C l^{-}$ to $C l_{2}$ .