Balancing Redox Equations in Acid
Cr2O72-(aq) + I -(aq) Cr3+(aq) + I2 (s)
Step #1: Break into oxidation and reduction equations:
Cr2O72- Cr3+ [reduction]
I - I2 [oxidation]
Step #2: Balance atoms and charges in each half-reaction:
For the Cr2O72-/Cr3+ half-reaction:
a) Balance atoms other than O and H: Balance the Chromium
Cr2O72- 2 Cr3+
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