Balancing Redox Reaction Worksheet 1
Balance each redox reaction in acid solution.
1. Mn2+ + BiO3 MnO4 - + Bi3+
2. MnO4- + S2O6 2+
S4O6 2- + Mn2+
3. ClO3 - + Cl -
Cl2 + ClO2
4. P + Cu2+
Cu + H2PO4-
5. PH3 + I2
H3PO2 - + I-
6. NO2
NO3 - + NO
Basic Solutions
1. MnO4 - + C2O4 22. ClO2
MnO2 + CO2
ClO2- + ClO3-
3. Cu (NH3)4 2+ + S2O4
SO3 2- + NH3
4. Zn + NO3 -
Zn(OH)4 2- + NH3
5. Al + OH-
AlO2 - + H2
6. Zn
Zn(OH)4 2+ + H2
Balancing Redox Reactions Worksheet 2
Balance each redox reaction in acid solution.
1. H2O2 + Cr2O7 2+
O2 + Cr 3+
2. TeO3 2+ + N2O4
Te + NO3 –
3. ReO4 + IO-
IO3 - + N2O4
4. PbO2 + I2
Pb2+ + IO3 –
5. As
H2AsO4 - + AsH3
Basic Solutions.
1. O2 + Cr3+
H2O + Cr2O4 2+
2. Te + NO3 -
TeO3 2- + N2O4
3. IO3 - + Re
ReO4 - + IO-
4. Pb2+ + IO2 -
PbO2 + I2
5. Cr2O7 2- + Hg
Hg2+ + Cr 3+
Balancing Redox Reactions in acid and Basic Solution.
Balance each half reaction in basic solution.
4. Cr2O7 2-
Cr3+
5. NO
NO 3 –
6. SO4 2-
SO2
7. MnO2
Mn2O3
Balance each redox reaction in acid solution using the half reaction method.
8. H2O2 + Cr2O7 2-
O2 + Cr2+
9. TeO3 2- + N2O4
Te + NO3 –
10. ReO4 - + IO-
IO3 - + Re
11. PbO2 + I2
Pb2+ + IO3 –
12. As
H2AsO4 + AsH3
Balance each redox reaction in basic solution using the half reaction method.
13. O2 + Cr3+
H2O2 + Cr2O7 2-
14. Te + NO3 -
TeO3 2+ + N2O4
15. IO3 - + Re
ReO4 - + IO-
16. Pb2+ + IO3 -
PbO2 + I2
17. Cr2O7 2- + Hg
Hg2+ + Cr3+
State of the change that represents oxidation, reduction or neither. Use oxidation #s.
REMEMBER: If the oxidation # increases it means oxidation and when it decreases it means
reduction.
18. MnO2
19. NH3
Mn2O3
NO2
20. HClO4
21. O2
22. P2O5
HCl + H2O
O2
P4H10
Determine the oxidation number.
23. H2SO4 = _________
22. HSO4 – = ________
24. P4 = _________
23. NaH = _________
25. UO3 = _________
24. Na2O2 = _________
26. U2O5 = _________
25. PbSO4 = _________
Harder Balancing Questions: DISPROPORTIONATION
1. CuF2 + NH3
Cu3N + NH4F + N2
2. Ca3(PO4)2 + SiO2 + C
P4 + CaSiO3 + CO