BALANCING CHEMICAL EQUATIONS I Try to balance theses equations by writing the correct ratios in front of the

molecules/compounds 1. H2O + _CO2 _H2CO3

2. 2. _ CaC2 + _ O2 _ Ca + _ CO2

3. 3. _C5H12 + _O2 _CO2 + _H2O

4. 4. _K2SO4 + _ BaCl2 _KCl + _Ba SO4

5. 5. _KOH + _ K2SO4 _K2SO4 + _ H2O

6. _ Ca(OH)2 + _ NH4Cl _ NH4OH + _ CaCl2

7. _ C + _SO2 _ CS2 + _CO

8. _ Mg3N2 + _ H2O _ Mg(OH)2 + _ NH3

9. _ V2O5 + _ Ca _ CaO + _ V

10. _ Na2O2 + _ H2O _ NaOH + _ O2

11. _ Fe3O4 + _ H2 _ Fe + _ H2O

12. _ Cu + _ H2SO _ CuSO4 + _H2O + _ SO2

13. _ Al + _H2SO4 _H2 + _ A12(SO4)3

14. _ Si4H10 + _ O2 _ SiO2 + _ H2O

15. _NH3 + _O2 _N2H4 + _H2O

16. _ C15H30 + _ O2 _ CO2 + _ H2O

17. _BN + _F2 _BF3 + _N2

18. _ CaSO4.H2O + _ SO3 _ CaSO4 + _ H2SO4

19. _ C12H26 + _ O2 _ CO2 + _ H2O

20. _ C7H6O3 + _ O2 _ CO2 + _ H2O

21. _Na + _ZnI2 _NaI + _NaZn4

22. _ HBrO3 + _ HBr _ H2O + _ Br2

23. _ A14C3 + H2O _ A1(OH)3 + _CH4

24. _ Ca(NO3)2.3H2O + _ LaC2 _ Ca(NO3)2 + _ La(OH)2 + _ C2H2

25. _ CH3NO2 + _ Cl2 _ CC13NO2 + _ HC1

26. _ Ca3(PO4)2 + _ SiO2 + _ C _ CaSiO3 + _ CO + _ P

27. _Al2C6 + _H2O _ Al(OH)3 + _ C2H2

28. _ NaF + _CaO + _ H2O _ CaF2 + _ NaOH

29. _ LiH + _ AICI3 _ LiAlH4 + _LiCl

30. _ CaF2 + _ H2SO4 + _ SiO2 _ CaSO4 + _ SiF4 + _ H2O

31. _CaSi2 + _SbCl3 _Si + _Sb + _ CaCl2

32. _ TiO2 + _B4C + _C _ TiB2 + _ CO

33. _ NH3 + _ O2 _ NO + _ H2O

34. _SiF4 + _ NaOH _ Na4SiO4 + _ NaF + _ H2O

35. _ NH4C1 + _ CaO _ NH3 + _ CaCl2 + _ H2O

36. _ NaPb + C2H5C1 _ Pb(C2H5)4 + _ Pb + _ NaCl

37. _ Be2C + _ H2O _ Be(OH)2 + _CH4

38. _ NpF3 + _ O2 + _ HF _ NpF4 + _ H2O

39. _ NO2 + _H2O _ HNO3 + _ NO

40. _ LiAlH4 + _BF3 _ LiF + _ A1F3 + _ B2H6

41. _ N2 + _H2 _NH3

42. _K2CO3 + _H2O _KOH + _H2CO3

43. _H2O2 + _PbS _ PbSO4 + _H2O

44. _CaCO3 _CO2 + _CaO

45. _SnCl4 + _H2O _HCl + SnO2

46. _HCl _H2 + _Cl2

47. _Na + _H2O _NaOH + _H2

48. _ Cs2CO3 + _HBr _CO2 + _H2O + _CsBr

49. _ C11H24 _ C2H4 + _C3H6 + _H2

50. _ C2H5OH _O2 _CO2 + _H2O

II. Translate .the. following into chemical formulae and balance the equations. Include the phases (s = solid, 1 = liquid, g = gas) when this information is given or known. For example: "Liquid bromine reacts with gaseous chlorine to form solid bromine monochloride" is translated as: Br2(l) + Cl2(g) -* 2 BrCl(s)

1. Phosphoric acid reacts with sodium hydroxide to give sodium phosphate and water.

2. Sodium hydrogen carbonate reacts with sulphuric acid to produce sodium sulphate, water and

carbon dioxide.

3. Aluminum oxide and sulphuric acid produce water and aluminum sulphate.

4. Sodium metal reacts with water to produce solid sodium hydroxide and hydrogen gas.

5. Heptane (C7H16) burns in an atmosphere of oxygen.

6. Barium chloride dihydrate and silver oxide react to produce silver chloride, barium hydroxide

and water.

7. Solid sodium hydroxide reacts with chlorine gas to give solid sodium chloride, solid sodium

chlorate and water.

8. Nitrogen trifluoride and hydrogen react to form nitrogen and hydrofluoric acid.

9. Ferric chloride hexahydrate and sodium carbonate react to form sodium chloride, ferric carbonate

monohydrate and water.

10. Calcium carbonate and hydrogen chloride react to form carbon dioxide, calcium chloride and

water.

11. Solid sodium nitrate and solid sodium metal react to form solid sodium oxide and nitrogen gas.

12. Gaseous boron trichloride reacts with steam to yield solid boron trihydroxide and hydrogen

chloride gas.

13. Cobaltous chloride hexahydrate reacts violently with thionyl chloride (SOCI2) to form cobaltous

chloride, sulphur dioxide and hydrogen chloride.

14. Calcium hydride and water form hydrogen and calcium hydroxide.

15. Xenon hexafluoride reacts violently with water to form xenon trioxide and hydrogen fluoride.

III. Mind Benders (Optional — for Chemistry nuts!)

1. _ Cu + _ HNO3 _ Cu(NO3)2 + _ NO + _ H2O

2. _ FeCl2 + _ KNO3 + _ HC1 _ FeCl3 + _ NO + _ H2O + _ KCI

3 _ KMnO4 + _ HBr _ MnBr2 + _ Br2 + _ KBr + _ H2O

4. _ K2Cr2O7 + _ HC1 _ KCI + _ CrCl3 + _ H2O + _ Cl2