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Section 2: Balancing Redox Equations

Balancing Redox Equations

1.
Name the spectator ion in the following equation, including the correct coefficient:
Cu(s) + 4HNO3 (aq) → Cu(NO3)2 (aq) + 2NO2 + 2H2O (l)
A)2NO2
B)3NO2
C)2NO3
D)3NO3
2.
Determine the net change in oxidation number of chlorine in the following reaction:
ClO4- (aq) + Br- (aq) → Cl- (aq) + Br2(g) (in acid solution)
A)-8
B)-7
C)7
D)8
3.
Complete and balance the following redox equation. When properly balanced with whole—number coefficients, the coefficient of S is _________.
H2S + HNO3 → S + NO + H2O
A)1
B)2
C)3
D)4
4.
When the following equation is balanced what is the coefficient of Sn?
Sn + HNO3 → SnO2 + NO2 + H2O
A)1
B)2
C)3
D)4
5.
Balance the following ionic equation. What is the coefficient of the reducing agent in this reaction?
Fe2+(aq) + MnO4-(aq) + H+(aq) → Fe3+(aq) + Mn2+(aq) + H2O(l)
A)5
B)1
C)8
D)4
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