
Interpretation:
The given reaction in acidic medium by the ion- electron method has to be balanced.
Concept Introduction:
Ion-electron method: a way to balance a redox equation.
In the ion-electron method (also called the half-reaction method), the redox equation is separated into two half-reactions. One half-reaction for oxidation and another for reduction; further the reactions are balanced by following procedure.
Procedure for balancing redox equations:
Step 1: Write the unbalanced equation for the reaction in ionic form.
Step 2: Separate the equation into two half-reactions.
Step 3: Balance each half-reactions in number and type of atoms and charges. For reactions in an acidic medium, add
Step 4: Add the two half-reactions together and balance the final equation. The equation must be atomically and electrically balanced. In case of different number of electrons, need to multiply one or both half-reactions to equalize the number of electrons.
Step 5: Finally, the number and type of atoms; charges on both sides of the equation must be same and balanced.

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Chapter 19 Solutions
EBK GENERAL CHEMISTRY: THE ESSENTIAL CO
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