Chapter 11 Balancing

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Balancing Equations
Balance the following reactions and identify each as to type of reaction.
Comb = combination DR = double replacement C = combustion
D = decomposition
SR = single replacement
1.
Fe + S  FeS
2. H2O  H2 (g) + O2 (g)
3. Al + O2 (g)  Al2O3
4. N2 (g) + H2 (g)  NH3
5. CO2 + H2O  H2CO3
6. Zn + CuSO4  ZnSO4 + Cu
7. AgNO3 + NaBr  NaNO3 + AgBr
8. KClO3  KCl + O2 (g)
9. HgO  Hg + O2 (g)
10. KI + Pb(NO3)2  PbI2 + KNO3
11. MgCl2 + NH4NO3  Mg(NO3)2 + NH4Cl
12. FeCl3 + NH4OH  Fe(OH)3 + NH4Cl
13. Na2O2 + H2O  NaOH + O2 (g)
14. Fe2O3 + C  Fe + CO (g)
15. Fe + H2O  H2 (g) + Fe2O3
16. FeCl3 + KOH  KCl + Fe(OH)3
17. Al + H2SO4  Al2(SO4)3 + H2 (g)
18. Na + H2O  NaOH + H2 (g)
19. Zn + H2SO4  ZnSO4 + H2 (g)
20. CaO + H2O  Ca(OH)2
21. Fe + CuNO3  Fe(NO3)2 + Cu
22. FeS + HCl  H2S (g) + FeCl2
23. K2O + H2O  KOH
24. CaCl2 + HNO3  Ca(NO3)2 + HCl
25. SO2 + H2O  H2SO3
26. NH3 + O2  N2 (g) + H2O
27. CaCO3  CaO + CO2 (g)
28. KF + BaBr2  BaF2 + KBr
29. NaNO3   NaNO2 + O2 (g)
30. HCl + NH3  NH4Cl
31. Cu SO4 + Fe  FeSO4 + Cu
32. Al + HCl  AlCl3 + H2(g)
33. C + O2 (g)  CO2 (g)
34. H2S + O2 (g)  H2O + S
35. KI + Cl2  KCl + I2
36. CO2 (g ) + C  CO (g)
37. Hg2O + O2 (g)  HgO
38. CaO + MgCl2  MgO + CaCl2`
39. Ca + H2O  Ca(OH)2 + H2 (g)
40. Fe + O2 (g)  Fe2O3
Balancing Equations
Balance the following reactions and identify each as to type
of reaction.
Comb = combination DR = double replacement C =
combustion
D = decomposition
SR = single replacement
1. Fe + S  FeS
2. 2 H2O  2 H2
(g)
+ O2 (g)
3. 4 Al + 3 O2 (g)  2 Al2O3
4. N2 (g) + 3 H2 (g)  2 NH3
5. CO2 + H2O  H2CO3
6. Zn + CuSO4 
ZnSO4 + Cu
7. AgNO3 + NaBr  NaNO3 + AgBr
8. 2 KClO3  2 KCl + 3 O2 (g)
9.
10.
2 HgO  2 Hg + O2
(g)
2 KI + Pb(NO3)2  PbI2 + 2 KNO3
11.
MgCl2 + 2 NH4NO3  Mg(NO3)2 + 2 NH4Cl
12.
FeCl3 + 3 NH4OH 
13.
2 Na2O2
14.
Fe2O3
15.
Fe(OH)3 + 3 NH4Cl
+ 2 H2O  4 NaOH + O2 (g)
+ 3 C  2 Fe + 3 CO (g)
2 Fe + 3 H2O  3 H2 (g) + Fe2O3
16.
FeCl3 + 3 KOH  3 KCl + Fe(OH)3
17.
2 Al + 3 H2SO4  Al2(SO4)3 + 3 H2 (g)
18.
2 Na + 2 H2O  2 NaOH + H2 (g)
 ZnSO4 + H2 (g)
19.
Zn + H2SO4
20.
CaO + H2O  Ca(OH)2
21.
Fe + 2 CuNO3 
Fe(NO3)2 + 2 Cu
22.
FeS + 2HCl  H2S (g) + FeCl2
23.
K2O + H2O  2 KOH
24.
CaCl2 + 2 HNO3  Ca(NO3)2 + 2 HCl
25.
SO2 + H2O  H2SO3
26.
4 NH3 + 3 O2  2 N2 (g) + 6 H2O
27.
CaCO3  CaO + CO2 (g)
28.
2 KF + BaBr2
29.
 BaF2
+ 2 KBr
2 NaNO3   2 NaNO2 + O2 (g)
 NH4Cl
30.
HCl + NH3
31.
Cu SO4 + Fe 
32.
2 Al + 6 HCl  2 AlCl3 + 3 H2(g)
33.
C + O2 (g)  CO2 (g)
FeSO4 + Cu
+ O2 (g)  2 H2O +2 S
34.
2 H 2S
35.
2 KI + Cl2  2 KCl + I2
36.
CO2 (g ) + C  CO (g)
37.
2 Hg2O + O2 (g)  4 HgO
38.
CaO + MgCl2  MgO + CaCl2`
39.
Ca + 2 H2O  Ca(OH)2 + H2 (g)
40.
4 Fe + 3 O2 (g)  2 Fe2O3
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