Copyright © 2008 Pearson Prentice Hall, Inc.
Chapter 4/
48
Balancing Redox Reactions:
The Oxidation-Number Method
•
Assign oxidation numbers to all atoms.
2Cr
3+
(
aq
) +
I
O
3
1-
(
aq
)
I
1-
(
aq
) + Cr
2
O
7
2-
(
aq
)
-2
-1
-2
+6
+3
+5