Chemistry

Chemistry

Problem

Hydrogen peroxide decomposes in iodide solution by the following mechanism. Step 1 H2_2O2_2 + I−^- → H2_2O + IO−^- Step 2 H2_2O2_2 + IO−^- → H2_2O + I−^- + O2_2 Which of the following is the overall balanced chemical equation for the reaction? a) 2 H2O2  ⟶  2 H2O+2 O22\,\text{H}_2\text{O}_2 \;\longrightarrow\; 2\,\text{H}_2\text{O} + 2\,\text{O}_2 b) H2O2+I−  ⟶  H2O+O2+I−\text{H}_2\text{O}_2 + \text{I}^- \;\longrightarrow\; \text{H}_2\text{O} + \text{O}_2 + \text{I}^- c) 2 H2O2  ⟶  2 H2O+O22\,\text{H}_2\text{O}_2 \;\longrightarrow\; 2\,\text{H}_2\text{O} + \text{O}_2 d) 2 H2O2+2 I−  ⟶  2 H2O+2 IO−2\,\text{H}_2\text{O}_2 + 2\,\text{I}^- \;\longrightarrow\; 2\,\text{H}_2\text{O} + 2\,\text{IO}^-

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