Exercise - Balancing Redox Equations for
Reactions Run in Acidic Conditions:
Balance the following redox equations for reactions run in acidic
conditions.
(The answers are at the bottom of this page.)
a. MnO4-(aq) + Br-(aq)
--> MnO2(s) +
BrO3-(aq)
b. I2(s)
+ OCl-(aq)
--> IO3-(aq)
+ Cl-(aq)
c. Cr2O72-(aq)
+ C2O42-(aq)
--> Cr3+(aq) +
CO2(g)
d. Mn(s)
+ HNO3(aq)
--> Mn2+(aq) +
NO2(g)
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Answers
a. 2MnO4-(aq) + Br-(aq)
+ 2H+(aq)
--> 2MnO2(s) + BrO3-(aq)
+ H2O(l)
b. I2(s) + 5OCl-(aq)
+ H2O(l)
-->
2IO3-(aq) + 5Cl-(aq)
+ 2H+(aq)
c. Cr2O72-(aq) + 3C2O42-(aq)
+ 14H+(aq)
-->
2Cr3+(aq) + 6CO2(g)
+ 7H2O(l)
d. Mn(s) + 2HNO3(aq)
+ 2H+(aq)
--> Mn2+(aq) + 2NO2(g)
+ 2H2O(l)
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