In alkaline medium ClO2 oxidizes H2O2  to O2 and reduced itself to  Cl- then how many mole of H2O2 will oxidize by one mole of ClO2

In alkaline medium ClO2 oxidizes H2O2  to O2 and reduced itself to  Cl- then how many mole of H2O2 will oxidize by one mole of ClO2

  1. A

    1.0

  2. B

    1.5

  3. C

    2.5

  4. D

    3.5

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    Solution:

    OxidationReduction

    H2O2   O2

    H2O2 + 2OH-  O2 + 2H2O + 2e---(1)

    H2O2 + 2OH-  O2 + 2H2O + 2e- ×5

    ClO2  Cl-

    ClO2 + 2H2O + 5e-   Cl- + 4OH---(2)

    ClO2 + 2H2O + 5e-   Cl- + 4OH- ×2

    (1)x5 + (2)x2 
    2ClO2 + 5H2O2 + 2 OH-   2Cl- + 5O2 +6H2O

    2ClO2  5H2O2

       ClO2  2.5  H2O2

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