In the following redox reaction Cr2O72-Fe2- Fe3-Cr3- One mole of Cr2O72- oxidises-

Oxidation half reaction 6Fe^+2→ 6Fe^+3+6e^ Reduction half reaction Cr_2O_7^2 +14H^++6e^ → 2Cr^+3+7H_2O nbsp; The full ionic equation may be obtained by addin ...

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Byju's Answer

Standard XII

Chemistry

Valency and Oxidation State

In the follow...

Question

In the following redox reaction $C r_{2} O_{7}^{2 -} + F e^{2 +} \to F e^{3 +} + C r^{3 +}$ One mole of $C r_{2} O_{7}^{2 -}$ oxidises?

6 mole of

F e^{2 +}

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1 mole of

F e^{2 +}

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4 mole of

F e^{2 +}

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3 mole of

F e^{2 +}

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Solution

The correct option is A 6 mole of $F e^{2 +}$
Oxidation half reaction $6 F e^{+ 2} \to 6 F e^{+ 3} + 6 e^{-}$
Reduction half reaction $C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{+ 3} + 7 H_{2} O$
The full ionic equation may be obtained by adding the half-reaction for potassium dichromate to the half-reaction for the reducing agent
$6 F e^{2 +} + C r_{2} O_{7}^{2 -} + 14 H^{+} \to 6 F e^{+ 3} + 2 C r^{+ 3} + 7 H_{2} O$
Thus, One mole of $C r_{2} O_{7}^{2 -}$ oxidises 6 mole of $F e^{2 +}$

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Similar questions

Balance the following redox reactions by ion-electron method:

(a) (aq) + I^– (aq) → MnO₂ (s) + I₂(s) (in basic medium)

(b) (aq) + SO₂ (g) → Mn²⁺ (aq) + (aq) (in acidic solution)

(d) + SO₂(g) → Cr³⁺ (aq) + (aq) (in acidic solution)

In the following redox reaction,

Cr2O2−7+Fe2+⟶Fe3++Cr3+Cr₂O₇²⁻+Fe²⁺⟶Fe³⁺+Cr³⁺

1 mole of Cr2O2− C r 2 O 7 2 −oxidises how many moles of fe

Q. Write balanced half reactions for the following redox reaction:

C r_{2} O_{7}^{2 -} + F e^{2 +} \to C r^{3 +} + F e^{3 +}

Q. Write the final balanced reaction for the following redox reaction:

C r_{2} O_{7}^{2 -} + F e^{2 +} \to C r^{3 +} + F e^{3 +}

Q. In the following redox reaction

{C r}_{2} O_{7}^{2 -} + {F e}^{2 +} ⟶ {F e}^{3 +} + {C r}^{3 +}

1 mol of

C r_{2} O_{7}^{2 -}

oxidizes x mol of

{F e}^{+ 2}

. Find x.

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In the following redox reaction Cr2O2−7+Fe2+→Fe3++Cr3+ One mole of Cr2O2−7 oxidises?

In the following redox reaction $C r_{2} O_{7}^{2 -} + F e^{2 +} \to F e^{3 +} + C r^{3 +}$ One mole of $C r_{2} O_{7}^{2 -}$ oxidises?