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Ch.19 - Electrochemistry
Chapter 19, Problem 41c

Balance each redox reaction occurring in basic aqueous solution. c. Cl2(g) → Cl(aq) + ClO(aq)

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1
Identify the oxidation and reduction half-reactions. In this case, Cl2 is being reduced to Cl- and oxidized to ClO-. Write the half-reactions: Cl2 → Cl- and Cl2 → ClO-.
Balance the atoms other than oxygen and hydrogen in each half-reaction. For the reduction half-reaction, Cl2 → 2Cl-. For the oxidation half-reaction, Cl2 → ClO-.
Balance the oxygen atoms by adding H2O molecules. For the oxidation half-reaction, add one H2O to the right side: Cl2 → ClO- + H2O.
Balance the hydrogen atoms by adding OH- ions. For the oxidation half-reaction, add two OH- to the left side: Cl2 + 2OH- → ClO- + H2O.
Balance the charges by adding electrons. For the reduction half-reaction, add two electrons to the right side: Cl2 + 2e- → 2Cl-. For the oxidation half-reaction, add two electrons to the left side: Cl2 + 2OH- + 2e- → ClO- + H2O.

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