Redox Problems
Name
Period
1. What is oxidized and what is reduced?
8. Identify the oxidation number of the boldface element.
2Br- + Cl2 → Br2 + 2Cl-
AsO43-
2. What is oxidized and what is reduced?
9. Identify the oxidation number of the boldface element.
2Ce + 3Cu2+ → 3Cu + 2Ce3+
CrO42-
3. What is oxidized and what is reduced?
10. Identify the oxidation number of the boldface element.
2Zn + O2 → 2ZnO
Ca3N2
4. Identify the oxidation number of the boldface element.
11. Identify the oxidation number of the boldface element.
H(NO2)
MnO45. Identify the oxidation number of the boldface element.
NH4+
12. What is oxidized and what is reduced?
3Br2 + 2Ga → 2GaBr3
6. Identify the oxidation number of the boldface element.
Al(PO4)
13. What is oxidized and what is reduced?
7. Identify the oxidation number of the boldface element.
NH4+
HCl + Zn → ZnCl2 + H2
14. What is oxidized and what is reduced?
20. MgI2 + Br2 → MgBr2 + I2
Mg + N2 → Mg3N2
15. What is oxidized and what is reduced?
H2S + Cl2 → 2HCl + S
21. 2Al + 3I2 → 2Al+3 + 6I-
16. What is oxidized and what is reduced?
N2 + 3H2 → 2NH3
22. Li2(SO4) + Ca(NO3)2 → 2Li(NO3) + Ca(SO4)
17. What is oxidized and what is reduced?
2Na + I2 → 2NaI
Assign oxidation numbers for each element in the equations
then identify what was oxidized and what was reduced. Use
NR if no reaction occurs.
23. KI + Ag(NO3) → K(NO3) + AgI
18. Pb + Pd(NO3) → Pb(NO3) + Pd
24. H2SO4 + 2KOH → 2H2O + K2SO4
19. Fe + Ag+ → Fe+2 + Ag