Copyright © 2008 Pearson
Prentice Hall, Inc.
Balancing Redox Reactions: The
Half-Reaction Method
•Since the
reaction occurs in a basic solution, “neutralize” the excess H1+ by adding OH1- and cancel any water (if possible)
2MnO2(s) + H2O(l) + BrO31-(aq) + 2OH1-(aq)
2OH1-(aq) + 2H1+(aq) + 2MnO41-(aq) +
Br1-(aq)
2H2O
2MnO2(s) + BrO31-(aq) +
2OH1-(aq)
H2O(l) +
2MnO41-(aq) + Br1-(aq)