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In this reaction: S(2)O(8)^(2-)+2I^(-) t...

In this reaction: `S_(2)O_(8)^(2-)+2I^(-) to 2SO_(4)^(2-)+I_(2)`

A

oxidation of iodide into iodine takes place

B

reduction of iodine into iodide takes place

C

both oxidation and reduction of iodine takes place

D

None of these

Text Solution

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The correct Answer is:
A
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Explore conceptually related problems

The experiment rate law for the reaction S_(2)O_(8)^(2-)(aq) + 2I^(ɵ)(aq) rarr 2SO_(4)^(2-) (aq) + I_(2)(aq) is k[S_(2)O_(8)^(2-)] [I^(ɵ)] . How would the rate change if (a) Concentration of S_(2)O_(8)^(2-) is halved. (b) Concentration of S_(2)O_(8)^(2-) and I^(ɵ) are halved.

In the reaction 2I^(-) + S_(2)O_(8)^(2-) rarr I_(2) + 2SO_(4)^(2-) the catalyst is (A) Fe^(+3) (B) Mn^(+2) (C) Cu^(+2) (D) Ni^(+2)

Knowledge Check

  • In the reaction 2S_(2)O_(3)^(2-)+I_(2)to S_(4)O_(6)^(2-)+2I^(-) the eq. wt of Na_(2)S_(2)O_(3) is equal to its

    A
    mol .wt
    B
    mol.wt/8
    C
    mol. wt/6
    D
    none of these

  • Assertion : In the reactin, 2S_(2)O_(3)^(2-)+I_(2) to S_(4)O_(6)^(2-) + 2I^(-): I_(2) is oxidised. Reason : During oxidation, loss of electron takes place.

    A
    If both Assertion and Reason are correct, and Reason is the correct explanation of Assertion.
    B
    If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
    C
    If Assertion is correct, but Reason is incorrect.
    D
    If Assertion is incorrect, but Reason is correct.

  • The reaction S_(2)O_(8)^(2-) + 3I^(-) rarr 2SO_(4)^(2-) + I_(3)^(-) is of first order both with respect to the persulphate and iodide ions. Taking the initial concentration as 'a' and 'b' respectively and taking x as the concentration of the trioxide at time t a differential rate equation can be written. Two suggested mechanisms for the reaction are: (I) S_(2)O_(8)^(2-)+I^(-) rarr SO_(4)I^(-)+SO_(4)^(2-) (fast) I^(-)+SO_(4)I^(-) overset(k_(1)) rarr I_(2) + SO_(4)^(2-) (slow) I^(-)+I_(2) overset (k_(2)) rarr I_(3)^(-) (fast) (II) S_(2)O_(8)^(2-)+I^(-) overset(k_(1)) rarr S_(2) O_(8) I^(3-) (slow) S_(2)O_(8)I^(3-) overset(k_(2)) rarr 2SO_(4)^(2-) +I^(+) (fast) I^(+)+I^(-) overset (k_(3)) rarr I_(2) (fast) I_(2)+I^(-) overset(k_(4)) rarr I_(3)^(-) (fast) How could the progress of this reaction be best monitored?

    A
    By monitoring the colour of the reaction mixture
    B
    By titration of `I_(3)^(-)` with hypo
    C
    By precipitation of `I^(-)` with `Ag^(+)`
    D
    By monitoring the change in pressure.

    • Similar Questions

    Explore conceptually related problems

    The reaction S_(2)O_(8)^(2-) + 3I^(-) rarr 2SO_(4)^(2-) + I_(3)^(-) is of first order both with respect to the persulphate and iodide ions. Taking the initial concentration as 'a' and 'b' respectively and taking x as the concentration of the trioxide at time t a differential rate equation can be written. Two suggested mechanisms for the reaction are: (I) S_(2)O_(8)^(2-)+I^(-) rarr SO_(4)I^(-)+SO_(4)^(2-) (fast) I^(-)+SO_(4)I^(-) overset(k_(1)) rarr I_(2) + SO_(4)^(2-) (slow) I^(-)+I_(2) overset (k_(2)) rarr I_(3)^(-) (fast) (II) S_(2)O_(8)^(2-)+I^(-) overset(k_(1)) rarr S_(2) O_(8) I^(3-) (slow) S_(2)O_(8)I^(3-) overset(k_(2)) rarr 2SO_(4)^(2-) +I^(+) (fast) I^(+)+I^(-) overset (k_(3)) rarr I_(2) (fast) I_(2)+I^(-) overset(k_(4)) rarr I_(3)^(-) (fast) The general differential equation for the above reaction is:

    The reaction S_(2)O_(8)^(2-) + 3I^(-) rarr 2SO_(4)^(2-) + I_(3)^(-) is of first order both with respect to the persulphate and iodide ions. Taking the initial concentration as 'a' and 'b' respectively and taking x as the concentration of the trioxide at time t a differential rate equation can be written. Two suggested mechanisms for the reaction are: (I) S_(2)O_(8)^(2-)+I^(-) rarr SO_(4)I^(-)+SO_(4)^(2-) (fast) I^(-)+SO_(4)I^(-) overset(k_(1)) rarr I_(2) + SO_(4)^(2-) (slow) I^(-)+I_(2) overset (k_(2)) rarr I_(3)^(-) (fast) (II) S_(2)O_(8)^(2-)+I^(-) overset(k_(1)) rarr S_(2) O_(8) I^(3-) (slow) S_(2)O_(8)I^(3-) overset(k_(2)) rarr 2SO_(4)^(2-) +I^(+) (fast) I^(+)+I^(-) overset (k_(3)) rarr I_(2) (fast) I_(2)+I^(-) overset(k_(4)) rarr I_(3)^(-) (fast) Which mechanism is consistent with the facts given about the reaction rate equation?

    The reaction S_(2)O_(8)^(2-) + 3I^(-) rarr 2SO_(4)^(2-) + I_(3)^(-) is of first order both with respect to the persulphate and iodide ions. Taking the initial concentration as 'a' and 'b' respectively and taking x as the concentration of the trioxide at time t a differential rate equation can be written. Two suggested mechanisms for the reaction are: (I) S_(2)O_(8)^(2-)+I^(-) rarr SO_(4)I^(-)+SO_(4)^(2-) (fast) I^(-)+SO_(4)I^(-) overset(k_(1)) rarr I_(2) + SO_(4)^(2-) (slow) I^(-)+I_(2) overset (k_(2)) rarr I_(3)^(-) (fast) (II) S_(2)O_(8)^(2-)+I^(-) overset(k_(1)) rarr S_(2) O_(8) I^(3-) (slow) S_(2)O_(8)I^(3-) overset(k_(2)) rarr 2SO_(4)^(2-) +I^(+) (fast) I^(+)+I^(-) overset (k_(3)) rarr I_(2) (fast) I_(2)+I^(-) overset(k_(4)) rarr I_(3)^(-) (fast) For the reaction I_(2)+2S_(2)O_(3)^(2-) rarr S_(4)O_(6)^(2-)+ 2I^(-) (P) -(d[I_(2)])/(dt)=-1/2(d[S_(2)O_(3)^(2-)])/(dt) (Q) -(d[I_(2)])/(dt)=-2(d[S_(2)O_(3)^(2-)])/(dt) (R) (d[I^(-)])/(dt)=-2(d[I_(2)])/(dt)xx(d[S_(2)O_(3)^(2-)])/(dt) (S) (d[S_(4)O_(6)^(2-)])/(dt)=1/2(d[I^(-)])/(dt)

    In the reaction I_(2)+2S_(2)O_(3)^(2-)to2I^(-)+S_(4)O_(6)^(2-) , the equivalent weight of iodine will be equal to

    In the reaction, I_(2)+2S_(2)O_(3)^(2-) to 2I^(-)+S_(4)O_(6)^(2-) equivalent weight will be equal to :

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