The document contains examples of chemical equations balanced using mole ratios. It begins with simple equations like H2 + O2 → H2O and progresses to more complex examples involving multiple reactants and products like Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3. For each equation, example problems are provided calculating quantities of substances involved in the reaction using moles. The document emphasizes using mole ratios to determine relative quantities and demonstrates balancing a variety of equation types.

1. C ING
LA N
BA CHEMICAL EQUATIONS
(“The Baker’s Dozen”)
IBMYP G10 Science
International School of Tanganyika

2. RUL
ES
REACTANTS = PRODUCTS
COEFFICIENTS MULTIPLY EVERYTHING
COUNT & LIST
BE METHODICAL
OXYGEN & HYDROGEN LAST

3. l a r Ag = 107.9 amu
o s
Ag = 107.9 g/mol
M as Like this...
The atomic mass of an
M element expressed in grams
is the mass of one mole
(6.02e23 atoms) of that
element.
N = 14.01 amu
N = 14.01 g/mol Like this...

5. H2 + O2 → H2O

6. H2 + O2 → H2O

7. H2 + O2 → H2O
2H2 + O2 → 2H2O

8. H2 + O2 → H2O
2H2 + O2 → 2H2O

9. H2 + O2 → H2O
2H2 + O2 → 2H2O
How many moles of hydrogen are needed to produce 13 moles of
water?

10. H2 + O2 → H2O
2H2 + O2 → 2H2O
How many moles of hydrogen are needed to produce 13 moles of
water?
How many moles of hydrogen would be needed to react with 48g of
oxygen gas?

11. H2 + O2 → H2O
2H2 + O2 → 2H2O
How many moles of hydrogen are needed to produce 13 moles of
water?
How many moles of hydrogen would be needed to react with 48g of
oxygen gas?

13. Fe + Cl2 → FeCl3

14. Fe + Cl2 → FeCl3

15. Fe + Cl2 → FeCl3
2Fe + 3Cl2 → 2FeCl3

16. Fe + Cl2 → FeCl3
2Fe + 3Cl2 → 2FeCl3
How many moles of chlorine are needed to produce 5 moles
of iron(III)chloride?

17. Fe + Cl2 → FeCl3
2Fe + 3Cl2 → 2FeCl3
How many moles of chlorine are needed to produce 5 moles
of iron(III)chloride?

18. Fe + Cl2 → FeCl3
2Fe + 3Cl2 → 2FeCl3
How many moles of chlorine are needed to produce 5 moles
of iron(III)chloride?
How many grams of chlorine gas are needed to react with 8
moles of iron?

19. Fe + Cl2 → FeCl3
2Fe + 3Cl2 → 2FeCl3
How many moles of chlorine are needed to produce 5 moles
of iron(III)chloride?
How many grams of chlorine gas are needed to react with 8
moles of iron?

20. Fe + Cl2 → FeCl3
2Fe + 3Cl2 → 2FeCl3
How many moles of chlorine are needed to produce 5 moles
of iron(III)chloride?
How many grams of chlorine gas are needed to react with 8
moles of iron?
How many grams of iron are needed to produce 250g of
iron(III)chloride?

22. MOLE RATIO

23. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3

24. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3

25. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3

26. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3
This means

27. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3
This means
10 mol Fe will react with 15 mol Cl2
to produce 10 mol FeCl3

28. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3
This means
10 mol Fe will react with 15 mol Cl2
to produce 10 mol FeCl3
because 10:15:10

29. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3
This means
10 mol Fe will react with 15 mol Cl2
to produce 10 mol FeCl3
because 10:15:10
can be reduced to

30. MOLE RATIO
2Fe + 3Cl2 → 2FeCl3
2 mol Fe : 3 mol Cl2 : 2 mol FeCl3
This means
10 mol Fe will react with 15 mol Cl2
to produce 10 mol FeCl3
because 10:15:10
can be reduced to
2:3:2

32. KO2 + CO2 → K2CO3 + O2

33. KO2 + CO2 → K2CO3 + O2

34. KO2 + CO2 → K2CO3 + O2
4KO2 + 2CO2 → 2K2CO3 + 3O2

35. KO2 + CO2 → K2CO3 + O2
4KO2 + 2CO2 → 2K2CO3 + 3O2
How many moles of potassium oxide are needed to produce 5
moles of oxygen gas?

36. KO2 + CO2 → K2CO3 + O2
4KO2 + 2CO2 → 2K2CO3 + 3O2
How many moles of potassium oxide are needed to produce 5
moles of oxygen gas?

37. KO2 + CO2 → K2CO3 + O2
4KO2 + 2CO2 → 2K2CO3 + 3O2
How many moles of potassium oxide are needed to produce 5
moles of oxygen gas?
How many grams of carbon dioxide are needed to react with
25g of potassium oxide?

38. KO2 + CO2 → K2CO3 + O2
4KO2 + 2CO2 → 2K2CO3 + 3O2
How many moles of potassium oxide are needed to produce 5
moles of oxygen gas?
How many grams of carbon dioxide are needed to react with
25g of potassium oxide?

39. KO2 + CO2 → K2CO3 + O2
4KO2 + 2CO2 → 2K2CO3 + 3O2
How many moles of potassium oxide are needed to produce 5
moles of oxygen gas?
How many grams of carbon dioxide are needed to react with
25g of potassium oxide?
How many grams of potassium carbonate are produced from
250g of KO2?

41. Zn + HCl → ZnCl2 + H2

42. Zn + HCl → ZnCl2 + H2

43. Zn + HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2

44. Zn + HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2
How many grams of hydrochloric acid will produce 5 moles of
zinc(II)chloride?

45. Zn + HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2
How many grams of hydrochloric acid will produce 5 moles of
zinc(II)chloride?

46. Zn + HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2
How many grams of hydrochloric acid will produce 5 moles of
zinc(II)chloride?
How many grams of zinc will react with 8.5 moles of HCl?

47. Zn + HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2
How many grams of hydrochloric acid will produce 5 moles of
zinc(II)chloride?
How many grams of zinc will react with 8.5 moles of HCl?

48. Zn + HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2
How many grams of hydrochloric acid will produce 5 moles of
zinc(II)chloride?
How many grams of zinc will react with 8.5 moles of HCl?
How many hydrogen molecules will be produced by the
reaction of 250g of Zn with excess HCl?

50. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3

51. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3

52. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3

53. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3

54. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
How many moles of lead nitrate are needed to produce 567.5g
of lead chloride?

55. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
How many moles of lead nitrate are needed to produce 567.5g
of lead chloride?

56. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
How many moles of lead nitrate are needed to produce 567.5g
of lead chloride?
How many grams of aluminum chloride gas are needed to
produce 9.52e24 particles of aluminum nitrate?

57. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
How many moles of lead nitrate are needed to produce 567.5g
of lead chloride?
How many grams of aluminum chloride gas are needed to
produce 9.52e24 particles of aluminum nitrate?

58. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
How many moles of lead nitrate are needed to produce 567.5g
of lead chloride?
How many grams of aluminum chloride gas are needed to
produce 9.52e24 particles of aluminum nitrate?
How many nitrogen atoms are needed to produce 125g of
aluminum nitrate?

60. Cu + AgNO3 → Cu(NO3)2 + Ag

61. Cu + AgNO3 → Cu(NO3)2 + Ag

62. Cu + AgNO3 → Cu(NO3)2 + Ag
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

63. Cu + AgNO3 → Cu(NO3)2 + Ag
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

64. Cu + AgNO3 → Cu(NO3)2 + Ag
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
(it looks tough but is actually pretty simple)

66. Na2SO4 + C → Na2S + CO2

67. Na2SO4 + C → Na2S + CO2

68. Na2SO4 + C → Na2S + CO2
Na2SO4 + 2C → Na2S + 2CO2

69. Na2SO4 + C → Na2S + CO2
Na2SO4 + 2C → Na2S + 2CO2
(simple simple...)

70. Na2SO4 + C → Na2S + CO2
Na2SO4 + 2C → Na2S + 2CO2
(simple simple...)

72. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3

73. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3

74. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3

75. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3

76. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
(that was a little harder, but not really...)

78. CH2Cl2 + O2 → CO2 + H2O + Cl2

79. CH2Cl2 + O2 → CO2 + H2O + Cl2

80. CH2Cl2 + O2 → CO2 + H2O + Cl2
2CH2Cl2 + 3O2 → 2CO2 + 2H2O + 2Cl2

81. CH2Cl2 + O2 → CO2 + H2O + Cl2
2CH2Cl2 + 3O2 → 2CO2 + 2H2O + 2Cl2

82. CH2Cl2 + O2 → CO2 + H2O + Cl2
2CH2Cl2 + 3O2 → 2CO2 + 2H2O + 2Cl2
(getting tougher...)

84. C3H8 + O2 → CO2 + H2O

85. C3H8 + O2 → CO2 + H2O

86. C3H8 + O2 → CO2 + H2O
C3H8 + 5O2 → 3CO2 + 4H2O

87. C3H8 + O2 → CO2 + H2O
C3H8 + 5O2 → 3CO2 + 4H2O
(not too bad...)

88. C3H8 + O2 → CO2 + H2O
C3H8 + 5O2 → 3CO2 + 4H2O
(not too bad...)

90. Ag2(CO3) → Ag + CO2 + O2

91. Ag2(CO3) → Ag + CO2 + O2

92. Ag2(CO3) → Ag + CO2 + O2
2Ag2(CO3) → 4Ag + 2CO2 + O2

93. Ag2(CO3) → Ag + CO2 + O2
2Ag2(CO3) → 4Ag + 2CO2 + O2

94. Ag2(CO3) → Ag + CO2 + O2
2Ag2(CO3) → 4Ag + 2CO2 + O2
(it looks tricky...)

96. C4H10S + O2 → CO2 + H2O + SO3

97. C4H10S + O2 → CO2 + H2O + SO3

98. C4H10S + O2 → CO2 + H2O + SO3
C4H10S + 8O2 → 4CO2 + 5H2O + SO3

99. C4H10S + O2 → CO2 + H2O + SO3
C4H10S + 8O2 → 4CO2 + 5H2O + SO3

100. C4H10S + O2 → CO2 + H2O + SO3
C4H10S + 8O2 → 4CO2 + 5H2O + SO3
(yikes!)

102. C2H3N + O2 → CO + H2O + NO2

103. C2H3N + O2 → CO + H2O + NO2

104. C2H3N + O2 → CO + H2O + NO2
4C2H3N + 11O2 → 8CO + 6H2O + 4NO2

105. C2H3N + O2 → CO + H2O + NO2
4C2H3N + 11O2 → 8CO + 6H2O + 4NO2

106. C2H3N + O2 → CO + H2O + NO2
4C2H3N + 11O2 → 8CO + 6H2O + 4NO2
(that was tough!)