Copyright © 2008 Pearson Prentice Hall, Inc.
Chapter 4/
56
Balancing Redox Reactions:
The Half-Reaction Method
•
Balance each half-reaction for O by adding H
2
O, and
then balance for H by adding H
1+
.
I
O
3
1-
(
aq
) +
6H
1+
(
aq
)
3H
2
O(
l
)
+ I
1-
(
aq
)
2Cr
3+
(
aq
) +
7H
2
O(
l
)
14H
1+
(
aq
)
+ Cr
2
O
7
2-
(
aq
)