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(iii) Dichlorine heptaoxide (Cl2O7 ) in gaseous state combines with an aqueous solution of hydrogen peroxide in acidic medium to give chlorite ion (ClO2– ) and oxygen gas. (Balance by ion electron method)

0 5 Views | Posted 4 months ago
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    Answered by

    alok kumar singh | Contributor-Level 10

    4 months ago

    We can balance the given reaction by ion electron method as

    Cl2O7 (g) + H2O2 (aq) → ClO2- +O2 (acidic medium)

    This is a Short answer type question as classified in NCERT Exemplar

    Balancing bu ion electron method

    2 × { Cl2O7 + 6H+ + 8e- → 2ClO2- + 3H2O

    8  × { H2O2 → O2 + 2H+ + 2e- 

    The balanced chemical is given as-

    2Cl2O7 + 12H+ + 16e- → 4ClO2- + 6H2O

                             8H2O2 → 8O2 + 16H+ + 16e-

              2Cl2O7 + 8H2O2

    ...more

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