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# 12 16 Mole Review Part Ii

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### Transcript of "12 16 Mole Review Part Ii"

1. 1. Launch: 12/15   Grab your binder and immediately take a seat!   Place HW (Review Worksheet #1), binder paper, and a pen/pencil on your desk. Review Objective #2: Tonight’s HW: Finish Review Worksheet #2
2. 2. Launch 12/15 4.  Which of the following is a balanced equation for the combustion of ethanol (C2H5OH)? a.  C2H5OH + 3O2  CO2 + 2H2O b.  C2H5OH + 3O2  2CO2 + 3H2O c.  C2H5OH + O2  2CO2 + 3H2O d.  C2H5OH + 2O2  3CO2 + 2H2O
3. 3. Launch 12/15 __C2H2 + __H2  __CH4 5.  When the equation above is completely balanced, the coefficient for H2 would be a.  1 b.  2 c.  3 d.  4
4. 4. Launch 12/15 4.  Which of the following is a balanced equation for the combustion of ethanol (C2H5OH)? a.  C2H5OH + 3O2  CO2 + 2H2O b.  C2H5OH + 3O2  2CO2 + 3H2O c.  C2H5OH + O2  2CO2 + 3H2O d.  C2H5OH + 2O2  3CO2 + 2H2O
5. 5. Launch 12/15 __C2H2 + __H2  __CH4 5.  When the equation above is completely balanced, the coefficient for H2 would be a.  1 b.  2 c.  3 d.  4
6. 6. Announcements   Unit #5 Exam on Thursday   Last day to review   One side of a 3 X 5 notecard   Make-up work is due today   Binder check on Friday   lpschem.wordpress.com
7. 7. Exam Information   30 multiple-choice questions   Balancing equations (6 questions = 20%)   The mole (9 questions = 30%)   Conversions (15 questions = 50%)   gram  mole (6 questions)   gram  atoms (3 questions)   gram  gram (6 questions)   3 free response
8. 8. Review: The Mole – Part II Mr. Heffner 12/16/09
9. 9. Conversions ? grams 6.02 X 1023 atoms 1 mole 1 mole ? moles Grams ? moles Moles Atoms 1 mole 1 mole ? grams 6.02 X 1023 atoms
10. 10. Conversions   There is a 3-step process for conversions: 1.  Write down the starting information and look at the ending information. 2.  Using the “Heart of Chemistry”, pick the correct conversion number “How many…” factor(s). 3.  Cancel like terms and do the math!
11. 11. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #1: Write down the starting information and look at the ending information. 4.04g H2
12. 12. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). 4.04g H2 X
13. 13. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). ? grams 6.02 X 1023 atoms 1 mole 1 mole End ? moles Grams ? moles Moles Atoms Start 1 mole 1 mole ? grams 6.02 X 1023 atoms molar mass
14. 14. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). 1 mol H2 4.04g H2 X X 2.02g H2
15. 15. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). ? grams 6.02 X 1023 atoms 1 mole 1 mole End ? moles Grams ? moles Moles Atoms Start 1 mole 1 mole ? grams 6.02 X 1023 atoms mole ratio
16. 16. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). 1 mol H2 1 mol O2 4.04g H2 X X X 2.02g H2 2 mol H2
17. 17. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). ? grams 6.02 X 1023 atoms 1 mole 1 mole End ? moles Grams ? moles Moles Atoms Start 1 mole 1 mole ? grams 6.02 X 1023 atoms molar mass
18. 18. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #2: Pick the correct conversion factor(s). 1 mol H2 1 mol O2 32.00g O2 4.04g H2 X X X = 2.02g H2 2 mol H2 1 mol O2
19. 19. Example #1 2H2 + O2  2H2O In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?   Step #3: Cancel like terms and do the math! 1 mol H2 1 mol O2 32.00g O2 4.04g H2 X X X = 2.02g H2 2 mol H2 1 mol O2 4 X 1 X 1 X 32 g O2 = 2X2X1 4 X 32 g O2 ~ 32 g O2 = = 4
20. 20. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #1: Write down the starting information and look at the ending information. 54.06g H2O
21. 21. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). 54.06g H2O X
22. 22. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). ? grams 6.02 X 1023 atoms 1 mole 1 mole End ? moles Grams ? moles Moles Atoms Start 1 mole 1 mole ? grams 6.02 X 1023 atoms molar mass
23. 23. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). 1 mol H2O 54.06g H2O X X 18.02g H2O
24. 24. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). ? grams 6.02 X 1023 atoms 1 mole 1 mole End ? moles Grams ? moles Moles Atoms Start 1 mole 1 mole ? grams 6.02 X 1023 atoms mole ratio
25. 25. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). 1 mol H2O 1 mol H2 54.06g H2O X X X 18.02g H2O 2 mol H2O
26. 26. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). ? grams 6.02 X 1023 atoms 1 mole 1 mole End ? moles Grams ? moles Moles Atoms Start 1 mole 1 mole ? grams 6.02 X 1023 atoms molar mass
27. 27. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #2: Pick the correct conversion factor(s). 1 mol H2O 1 mol H2 2.02g H2 54.06g H2O X X X = 18.02g H2O 2 mol H2O 1 mol H2
28. 28. Example #2 2Na + 2H2O  2NaOH + H2 If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?   Step #3: Cancel like terms and do the math! 1 mol H2O 1 mol H2 2.02g H2 54.06g H2O X X X = 18.02g H2O 2 mol H2O 1 mol H2 54 X 1 X 1 X 2g H2 = 18 X 2 X 1 54 g H2 ~ 3g H2 = = 18
29. 29. Whiteboards   Work in pairs   Trade-off marker every question   Partner without the marker should be checking work at each step!   You have 60 seconds to solve the question   Show all of your work!   Don’t forget units!   Lift board only when prompted
30. 30. How many grams of H2O would be produced from reacting 64.00g of O2? 2H2 + O2  2H2O
31. 31. How many grams of O2 would be required to completely react with 6.06g of H2? 2H2 + O2  2H2O
32. 32. If 64.00 grams of O2 are reacted, how many grams of water (H2O) are produced? 2H2 + O2  2H2O
33. 33. If 1.01 grams of H2 are reacted, how many grams of water (H2O) are produced? 2H2 + O2  2H2O
34. 34. Exit Slip 1.  Choose the correct conversion factor(s): How many moles are there in 24.02 grams of carbon (C)? 12.01g 6.02 X 1023 atoms 1 mole 1 mole 1 mole 12.01g I II III a.  I only b.  II only c.  III only d.  I and II
35. 35. Exit Slip 2.  Choose the correct conversion factor(s): How many atoms are there in 3 moles of CH4? 16.05g 6.02 X 1023 atoms 1 mole 1 mole 1 mole 16.05g I II III a.  I only b.  II only c.  III only d.  II and III
36. 36. Exit Slip 3.  Choose the correct conversion factor(s): How many grams of CH4 are there in 9.03 X 1023 atoms? 16.05g 6.02 X 1023 atoms 1 mole 1 mole 1 mole 6.02 X 1023 atoms I II III a.  I only b.  II only c.  II and III d.  I and III
37. 37. Exit Slip 4.  Choose the correct conversion factor(s): How many grams of H2O would be produced from 64.00 grams of O2? 2 mole H2O 18.02 grams H2O 1 mole O2 1 mole O2 1 mole H2O 32.00 grams O2 I II III a.  I only b.  II only c.  II and III d.  I, II, and III
38. 38. Exit Slip 1 mol C a.  12g C X 12.00g C 1 mol C 44.01g CO2 b.  24g C X X 12.00g C 1 mol CO2 2 mol C 1 mol CO2 44.01g CO2 c.  24g C X X X 12.00g C 2 mol C 1 mol CO2 1 mol C 1 mol CO2 44.01g CO2 d.  24g C X X X 12.00g C 1 mol C 1 mol CO2
39. 39. Homework   Finish practice questions worksheet
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