2. Balance and identify the type for the following reaction.
____ C3H ____O2 → ____CO ____H2O

3. For 100 points
C3H O2 → CO H2O
combustion

4. Balance and identify the type for the following reaction.
____Al ____Fe3N2 → ____AlN ____Fe

5. For 500 points
2Al Fe3N2 → 2 AlN Fe
Single replacement

6. Balance and identify the type for the following reaction.
Ammonia (NH3) reacts with hydrogen chloride to form ammonium chloride.

7. For 300 points
NH HCl  NH4Cl
synthesis

8. Balance and identify the type for the following reaction.
Bromine reacts with sodium iodide to form sodium bromide and iodine.

9. For 1000 points
1 Br NaI  NaBr I2
Single replacement

10. Balance and identify the type for the following reaction.
Phosphorus (P4) reacts with bromine to produce phosphorus tribromide.

11. For 2500 points
1 P Br2  PBr3
synthesis

12. Balance and identify the type for the following reaction.
Ethanol, C2H5OH, reacts with oxygen gas to produce carbon dioxide and water.

13. For 400 points
1 C2H5OH O2  CO H2O
combustion

14. Write and balance the following reaction.
Calcium hydride reacts with water to produce calcium hydroxide and hydrogen gas.

15. For 100 points
1 CaH H2O  Ca(OH) H2

16. Balance and identify the type for the following reaction.
Sulfuric acid, H2SO4, reacts with potassium hydroxide to produce potassium sulfate and water.

17. For points
H2SO KOH  K2SO H2O
Double replacement

18. Balance and identify the type for the following reaction.
____H2SO ____HI → ____H2S ____I ____H2O

19. For 50000 points H2SO4 + 8 HI → H2S + 4 I2 + 4 H2O
Double replacement / and or decomposition

20. Zinc reacts with copper(II) nitrate to form zinc nitrate and copper.
Balance and identify the type for the following reaction.
Zinc reacts with copper(II) nitrate to form zinc nitrate and copper.

21. For 1000 points Single replacement
1 Zn Cu(NO3)2  Zn(NO3) Cu
Single replacement

22. Balance and identify the type for the following reaction.
Acetaldehyde (CH3CHO) decomposes to form methane (CH4) and carbon monoxide.

23. For 100 points
1 CH3CHO  CH CO
decomposition

24. Balance and identify the type for the following reaction.
Sulfuric acid, H2SO4, reacts with potassium hydroxide to produce potassium sulfate and water.

25. For 8000 points
1 H2SO KOH  K2SO H2O
Double replacement

26. Balance and identify the type for the following reaction.
____H2O2 → ____H2O ____O2

27. For 200 points
2 H2O2 → 2 H2O ____O2
decomposition

28. Balance and identify the type for the following reaction.
____ZnS ____AlP → ____Zn3P ____Al2S3

29. For 300 points
3 ZnS AlP → Zn3P Al2S3
Double replacement

30. Balance and identify the type for the following reaction.
____N ____H2 → ____NH3

31. For 3000 points
N H2 → 2 NH3
synthesis

32. Balance and identify the type for the following reaction.
____S ____O2 → ____SO3

33. For 400 points
S O2 → 8 SO3
synthesis

34. Balance and identify the type for the following reaction.
____CO ____H2O → ____C6H12O ____O2

35. For 500 points
6 CO H2O → C6H12O O2
synthesis

36. Balance and identify the type for the following reaction.
  ____SiCl ____H2O → ____H4SiO ____HCl

37. For 200 points
  SiCl H2O → H4SiO HCl
Double replacement

38. Balance and identify the type for the following reaction.
____K ____Br2 → ____KBr

39. For 600 points
2 K Br2 → 2 KBr
synthesis

40. Balance and identify the type for the following reaction.
____P ____O2 → ____P2O5

41. For 300 points
P O2 → 2 P2O5
synthesis