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# Balancing equations

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• You're right Patrick. I think that was just a typo I made when creating the presentation.

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• This is either slide 31 or 36. The formula for potassium oxide is K2O, not KO2. To my knowledge there is no stable KO2.

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• ### Balancing equations

1. 1. C ING LA NBA CHEMICAL EQUATIONS (“The Baker’s Dozen”) IBMYP G10 Science International School of Tanganyika
2. 2. RUL ES REACTANTS = PRODUCTSCOEFFICIENTS MULTIPLY EVERYTHING COUNT & LIST BE METHODICAL OXYGEN & HYDROGEN LAST
3. 3. l a r Ag = 107.9 amu o s Ag = 107.9 g/molM 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 amuN = 14.01 g/mol Like this...
4. 4. H2 + O2 → H2O
5. 5. H2 + O2 → H2O
6. 6. H2 + O2 → H2O2H2 + O2 → 2H2O
7. 7. H2 + O2 → H2O2H2 + O2 → 2H2O
8. 8. H2 + O2 → H2O 2H2 + O2 → 2H2OHow many moles of hydrogen are needed to produce 13 moles of water?
9. 9. 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?
10. 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. 11. Fe + Cl2 → FeCl3
12. 12. Fe + Cl2 → FeCl3
13. 13. Fe + Cl2 → FeCl32Fe + 3Cl2 → 2FeCl3
14. 14. Fe + Cl2 → FeCl3 2Fe + 3Cl2 → 2FeCl3How many moles of chlorine are needed to produce 5 moles of iron(III)chloride?
15. 15. Fe + Cl2 → FeCl3 2Fe + 3Cl2 → 2FeCl3How many moles of chlorine are needed to produce 5 moles of iron(III)chloride?
16. 16. Fe + Cl2 → FeCl3 2Fe + 3Cl2 → 2FeCl3How 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?
17. 17. Fe + Cl2 → FeCl3 2Fe + 3Cl2 → 2FeCl3How 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?
18. 18. Fe + Cl2 → FeCl3 2Fe + 3Cl2 → 2FeCl3How 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?
19. 19. MOLE RATIO
20. 20. MOLE RATIO2Fe + 3Cl2 → 2FeCl3
21. 21. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3
22. 22. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3
23. 23. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3 This means
24. 24. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3 This means10 mol Fe will react with 15 mol Cl2 to produce 10 mol FeCl3
25. 25. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3 This means10 mol Fe will react with 15 mol Cl2 to produce 10 mol FeCl3 because 10:15:10
26. 26. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3 This means10 mol Fe will react with 15 mol Cl2 to produce 10 mol FeCl3 because 10:15:10 can be reduced to
27. 27. MOLE RATIO2Fe + 3Cl2 → 2FeCl32 mol Fe : 3 mol Cl2 : 2 mol FeCl3 This means10 mol Fe will react with 15 mol Cl2 to produce 10 mol FeCl3 because 10:15:10 can be reduced to 2:3:2
28. 28. KO2 + CO2 → K2CO3 + O2
29. 29. KO2 + CO2 → K2CO3 + O2
30. 30. KO2 + CO2 → K2CO3 + O24KO2 + 2CO2 → 2K2CO3 + 3O2
31. 31. KO2 + CO2 → K2CO3 + O2 4KO2 + 2CO2 → 2K2CO3 + 3O2How many moles of potassium oxide are needed to produce 5 moles of oxygen gas?
32. 32. KO2 + CO2 → K2CO3 + O2 4KO2 + 2CO2 → 2K2CO3 + 3O2How many moles of potassium oxide are needed to produce 5 moles of oxygen gas?
33. 33. KO2 + CO2 → K2CO3 + O2 4KO2 + 2CO2 → 2K2CO3 + 3O2How 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?
34. 34. KO2 + CO2 → K2CO3 + O2 4KO2 + 2CO2 → 2K2CO3 + 3O2How 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?
35. 35. KO2 + CO2 → K2CO3 + O2 4KO2 + 2CO2 → 2K2CO3 + 3O2How 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?
36. 36. Zn + HCl → ZnCl2 + H2
37. 37. Zn + HCl → ZnCl2 + H2
38. 38. Zn + HCl → ZnCl2 + H2Zn + 2HCl → ZnCl2 + H2
39. 39. Zn + HCl → ZnCl2 + H2 Zn + 2HCl → ZnCl2 + H2How many grams of hydrochloric acid will produce 5 moles of zinc(II)chloride?
40. 40. Zn + HCl → ZnCl2 + H2 Zn + 2HCl → ZnCl2 + H2How many grams of hydrochloric acid will produce 5 moles of zinc(II)chloride?
41. 41. Zn + HCl → ZnCl2 + H2 Zn + 2HCl → ZnCl2 + H2How 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?
42. 42. Zn + HCl → ZnCl2 + H2 Zn + 2HCl → ZnCl2 + H2How 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?
43. 43. Zn + HCl → ZnCl2 + H2 Zn + 2HCl → ZnCl2 + H2How 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?
44. 44. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
45. 45. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
46. 46. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
47. 47. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
48. 48. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3How many moles of lead nitrate are needed to produce 567.5g of lead chloride?
49. 49. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3How many moles of lead nitrate are needed to produce 567.5g of lead chloride?
50. 50. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3How 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?
51. 51. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3How 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?
52. 52. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3How 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?
53. 53. Cu + AgNO3 → Cu(NO3)2 + Ag
54. 54. Cu + AgNO3 → Cu(NO3)2 + Ag
55. 55. Cu + AgNO3 → Cu(NO3)2 + AgCu + 2AgNO3 → Cu(NO3)2 + 2Ag
56. 56. Cu + AgNO3 → Cu(NO3)2 + AgCu + 2AgNO3 → Cu(NO3)2 + 2Ag
57. 57. Cu + AgNO3 → Cu(NO3)2 + AgCu + 2AgNO3 → Cu(NO3)2 + 2Ag (it looks tough but is actually pretty simple)
58. 58. Na2SO4 + C → Na2S + CO2
59. 59. Na2SO4 + C → Na2S + CO2
60. 60. Na2SO4 + C → Na2S + CO2Na2SO4 + 2C → Na2S + 2CO2
61. 61. Na2SO4 + C → Na2S + CO2Na2SO4 + 2C → Na2S + 2CO2 (simple simple...)
62. 62. Na2SO4 + C → Na2S + CO2Na2SO4 + 2C → Na2S + 2CO2 (simple simple...)
63. 63. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
64. 64. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)3
65. 65. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
66. 66. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3
67. 67. Pb(NO3)2 + AlCl3 → PbCl2 + Al(NO3)33Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3 (that was a little harder, but not really...)
68. 68. CH2Cl2 + O2 → CO2 + H2O + Cl2
69. 69. CH2Cl2 + O2 → CO2 + H2O + Cl2
70. 70. CH2Cl2 + O2 → CO2 + H2O + Cl22CH2Cl2 + 3O2 → 2CO2 + 2H2O + 2Cl2
71. 71. CH2Cl2 + O2 → CO2 + H2O + Cl22CH2Cl2 + 3O2 → 2CO2 + 2H2O + 2Cl2
72. 72. CH2Cl2 + O2 → CO2 + H2O + Cl22CH2Cl2 + 3O2 → 2CO2 + 2H2O + 2Cl2 (getting tougher...)
73. 73. C3H8 + O2 → CO2 + H2O
74. 74. C3H8 + O2 → CO2 + H2O
75. 75. C3H8 + O2 → CO2 + H2OC3H8 + 5O2 → 3CO2 + 4H2O
76. 76. C3H8 + O2 → CO2 + H2OC3H8 + 5O2 → 3CO2 + 4H2O (not too bad...)
77. 77. C3H8 + O2 → CO2 + H2OC3H8 + 5O2 → 3CO2 + 4H2O (not too bad...)
78. 78. Ag2(CO3) → Ag + CO2 + O2
79. 79. Ag2(CO3) → Ag + CO2 + O2
80. 80. Ag2(CO3) → Ag + CO2 + O22Ag2(CO3) → 4Ag + 2CO2 + O2
81. 81. Ag2(CO3) → Ag + CO2 + O22Ag2(CO3) → 4Ag + 2CO2 + O2
82. 82. Ag2(CO3) → Ag + CO2 + O22Ag2(CO3) → 4Ag + 2CO2 + O2 (it looks tricky...)
83. 83. C4H10S + O2 → CO2 + H2O + SO3
84. 84. C4H10S + O2 → CO2 + H2O + SO3
85. 85. C4H10S + O2 → CO2 + H2O + SO3C4H10S + 8O2 → 4CO2 + 5H2O + SO3
86. 86. C4H10S + O2 → CO2 + H2O + SO3C4H10S + 8O2 → 4CO2 + 5H2O + SO3
87. 87. C4H10S + O2 → CO2 + H2O + SO3C4H10S + 8O2 → 4CO2 + 5H2O + SO3 (yikes!)
88. 88. C2H3N + O2 → CO + H2O + NO2
89. 89. C2H3N + O2 → CO + H2O + NO2
90. 90. C2H3N + O2 → CO + H2O + NO24C2H3N + 11O2 → 8CO + 6H2O + 4NO2
91. 91. C2H3N + O2 → CO + H2O + NO24C2H3N + 11O2 → 8CO + 6H2O + 4NO2
92. 92. C2H3N + O2 → CO + H2O + NO24C2H3N + 11O2 → 8CO + 6H2O + 4NO2 (that was tough!)