Balance these redox reactions occuring in basicsolutions a) H 2 O 2 + ClO 2 --->

Question

Balance these redox reactions occuring in basicsolutions a) H2O2 + ClO2 --->ClO- +O2 b) Cl2 ----> Cl-+ClO- Balance these redox reactions occuring in basicsolutions a) H2O2 + ClO2 --->ClO- +O2 b) Cl2 ----> Cl-+ClO- b) Cl2 ----> Cl-+ClO-

Explanation / Answer

a)    chlorine is reduced from 4+ in ClO2 to 1+ inClO- ClO2 + 3e-   => ClO-              add OH- to balance oxygens and H2O to balance water ClO2 + H2O + 3e-   => ClO-   +2OH- oxygen is oxidized from -1 (H2O2) to 0 H2O2   =>   O2 +e-                  H2O2 + 2OH- => O2 + e- + 2H2O multiply the oxidation reaction by 3 and add it to the reducingreaction (multiply by 3 is to eliminate the electron ClO2 + H2O + 3e-   => ClO-   +2OH- (H2O2 + 2OH- => O2 + e- + 2H2O)3 ----------------------------------------------- ClO2 + 3H2O2 + 4OH- => ClO-   +5H2O + 3O2

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