1. Balance the following half reactions in basic solution.

ClO3- (aq) �¨ ClO4- (aq)
Zn (s) �¨ Zn2+ (aq)
BrO3- (aq) �¨ Br- (aq)
IO3- (aq) �¨ I2 (s)
Sn2+ �¨ Sn4+

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