Exercise - Balance the following redox equations using either the
inspection technique or the oxidation number method. Be sure to
check that the atoms and the charge are balanced for each.
(The answers are at the bottom of this page.)
a. Al(s) + MnO2(s)
--> Al2O3(s) + Mn(s)
b. SO2(g) + HNO2(aq)
--> H2SO4(aq) +
NO(g)c. HNO3(aq) +
H2S(aq) -->
NO(g) + S(s) +
H2O(l)
d. Al(s) + H2SO4(aq)
--> Al2(SO4)3(aq) +
H2(g)
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to see the Study Sheet for this task.
Click on the following links to see examples.
Example
1
Example
2
Example
3
Return to the Balancing Redox
Equations Page.
Answers
a. 4Al(s) +
3MnO2(s)
--> 2Al2O3(s) +
3Mn(s)
b. SO2(g) +
2HNO2(aq)
--> H2SO4(aq) +
2NO(g)c.
2HNO3(aq) +
3H2S(aq)
-->
2NO(g) + 3S(s) +
4H2O(l)
d. 2Al(s) +
3H2SO4(aq)
--> Al2(SO4)3(aq) +
3H2(g)
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