Balancing Equations (2)

Balance the following in acid solution—

VO2+ + Zn ? VO2+ + Zn2+

Step 1: Write the half-reactions

Ox Zn ? Zn2+

Red VO2+ ? VO2+

Step 2: Balance each half-reaction for mass.

Ox Zn ? Zn2+

Red 2 H+ + VO2+ ? VO2+ + H2O

Add H2O on O-deficient side and add H+ on other side for H-balance.

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