Balancing REDOX Reactions Practice by cuiliqing

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									Mr. Chapman                                                                              Norquay School
Chemistry 30                                                                 Balancing Equations Practice

Balancing REDOX Reactions Practice
   1. Balance the following half-reactions for both atoms and electrons by adding the appropriate
      number of electrons to the correct side of the equation. Also identify each as either an oxidation
      or reduction.



                   Pb
             2+
   a. Pb




                   Cl
                       -
   b. Cl2




                   Fe
             3+            2+
   c.   Fe




   d. N2O + H2O  NO + H
                                    +




   2. Break each equation into two half-reactions. Identify each half-reaction as oxidation or reduction.



                  Cu + 2 H  Cu
                                +       2+
        a.                                   + H2




        b.        2 Al + 3 S  Al2S3
Mr. Chapman                                                                   Norquay School
Chemistry 30                                                      Balancing Equations Practice

   3. Balance each of the following REDOX reactions using the half-reaction method.

       a. Na + Br2  NaBr

       b. Ag + Cr2O72- + H+  Ag+ + Cr3+ + H2O

       c. Zn + S  ZnS

								
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