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Molar Conversions (p.80-85, 221-226)

Molar Conversions (p.80-85, 221-226). Ch. 3 & 7 – The Mole. Do Now:. Share your paragraph explaining the “why” of the flame test lab with a partner!. Consider This:.

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Molar Conversions (p.80-85, 221-226)

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  1. Molar Conversions(p.80-85, 221-226) Ch. 3 & 7 – The Mole

  2. Do Now: • Share your paragraph explaining the “why” of the flame test lab with a partner!

  3. Consider This: • How many atoms do chemists need to have in order to measure a quantity of an atom? Do you believe that the same number is always needed? Explain.

  4. VERY A large amount!!!! A. What is the Mole? • A counting number (like a dozen) • Avogadro’s number (NA) • 1 mol = 6.02  1023 items

  5. HOW LARGE IS IT??? • 1 mole of pennies would cover the Earth 1/4 mile deep! • 1 mole of hockey pucks would equal the mass of the moon! • 1 mole of basketballs would fill a bag the size of the earth!

  6. B. Molar Mass • Mass of 1 mole of an element or compound. • Atomic mass tells the... • atomic mass units per atom (amu) • grams per mole (g/mol) • Round to nearest whole number!

  7. B. Molar Mass Examples 12 g/mol 27 g/mol 65 g/mol • carbon • aluminum • zinc

  8. Molar Mass Chart:

  9. B. Molar Mass Examples • water • sodium chloride • H2O • 2(1) + 16 = 18 g/mol • NaCl • 23 + 35 = 58 g/mol

  10. B. Molar Mass Examples • sodium bicarbonate • sucrose • NaHCO3 • 23 + 1 + 12 + 3(16) = 84 g/mol • C12H22O11 • 12(12) + 22(1) + 11(16) = 342 g/mol

  11. B. Challenge Molar Mass Examples • 3 moles of Ammonia • 8 moles of Lithium Sulfate • 3 NH3 • 3(14) +3(3(1)) = 51 g/mol • LiSO4 • 8(7) + 8(32) + 8(4(16)) = 824 g/mol

  12. B. Challenge Molar Mass Examples • 6 moles of Calcium Phosphate Exit Card: • 2 moles of Calcium Chloride/ Rubidium Nitrate • 6 Ca3(PO4) 2

  13. Do Now: • What is the molar mass of silver? • What is the molar mass of silver nitrate? • If I have four moles of silver nitrate, how many grams do I have?

  14. C. Molar Conversion Examples Use this set up for mol to g REMEMBER: 1st—Molar Mass chart; 2nd –multiply by the number of moles! ____g ____ __mol____ = 1 mol ____

  15. C. Molar Conversion Examples Use this set up for g to mol REMEMBER: 1st—Molar Mass chart; 2nd –multiply by the number of moles! 1 mol ____ __g___ = ____g ____

  16. C. Molar Conversion Examples • How many moles of carbon are in 26 g of carbon? 26 g C 1 mol C 12.01 g C = 2.2 mol C

  17. C. Molar Conversion Examples • How many grams of cobalt nitrate are in 2 moles? REMEMBER: 1st—create the chart; 2nd –multiply by the number of moles! =

  18. Your Turn: • Spend the rest of the period working on the handout, you received at the door. • I will be monitoring and helping as needed!

  19. Do Now: • You measure out 725.11 grams of Copper (II) Phosphate. How many moles did you measure out?

  20. REMINDER: • The Fall Final Exam (which counts as two test grades is NEXT Thursday). • Take a moment to generate a list of ALL the topics that we have studied over the last semester!

  21. Topic List • Phase Diagrams • Density • Periodic Trends • Unit Conversion • Atom’s History • Sig Figs & Sci. Notation • Matter Classification (mix, ele, etc.) • Intensive/Extensive Prop. • Physical/Chemical Change • Atomic Structure (p, n, e) • Periodic Table • Electrons (behavior, orbitals, configuration) • Bonding (I, C, M) • Naming (Ionic & Covalent) • Writing Formulas • Molar Mass Calculation

  22. Want 10 Bonus Points? • Create a “Review Packet” • Must Contain: • Both Molar Mass wkshts from this week • A check off sheet, explaining how you studied each topic, SIGNED by a parent/guardian.

  23. For the Special Lab next Friday • Bring a fillable Christmas Ornament • Some sort of figurine • Cool present for a younger sibling/ yourself! • Can’t get the stuff? • You’ll do another lab.

  24. MASS IN GRAMS MOLES NUMBER OF PARTICLES C. Molar Conversions molar mass 6.02  1023 (g/mol) (particles/mol)

  25. C. Converting between moles: LITERS OF GAS AT STP Molar Volume (22.4 L/mol) MASS IN GRAMS NUMBER OF PARTICLES MOLES Molar Mass (g/mol) 6.02  1023 particles/mol Molarity (mol/L) LITERS OF SOLUTION

  26. Do Now: • How many grams are in 7.28 mol of AlPO4? Show your work!

  27. Very Quickly…. • Let’s set up this lab. • On your Styrofoam cup, write your name. • Sharing scissors, cut your pipe cleaner into fourths (fold in half twice then cut at all folds) • Twist into snowflake design • Get string from me (find a pencil/pen too!)

  28. Do Now: • How many molecules are in 4.00 moles of glucose?

  29. Alumimole Lab • Get into groups of three—assign each member a role: recorder, materials manager, and speaker • Listen to all directions. • You only have 15 minutes to complete the lab!

  30. Alumimole Procedure • Determine the molar mass of aluminum: __________g/1mol • Acquire exactly 0.1 mol of aluminum foil • Create a mole (animal) model • Explain how you determined the molar mass of aluminum in a sentence. • How many grams would be in 1. 5 mol of Aluminum? • In 22 mol of Aluminum? • How many atoms were in the amount of Al you got? Show all work!

  31. Check out your Snowflake… • Done? • Spray with acrylic spray and take home. • Note quite—let’s finish your set up. Periods 4-6.

  32. In the time remaining… • Work on your molar conversion worksheets. • Need help, ask a classmate!

  33. C. Molar Conversion Examples • How many molecules are in 2.50 moles of C12H22O11? 6.02  1023 molecules 1 mol 2.50 mol = 1.51  1024 molecules C12H22O11

  34. C. Molar Conversion Examples • Find the mass of 2.1  1024 molecules of NaHCO3. 2.1  1024 molecules 1 mol 6.02  1023 molecules 84.01 g 1 mol = 290 g NaHCO3

  35. Molar Mass Conversion Example • Find the number of liters of gas at STP in 4 mol of H2 gas 4 mol H2 22.4 L H2 1 mol H2 = 89.6 L H2

  36. More Practice: • If there are 9.6x10^15 particles of sugar in a solution then how many moles of sugar are there?

  37. More More Practice • When there are 0.0314 moles of candy canes how many candy canes are there?

  38. More More More Practice • What volume (L) is 0.00353 moles of He gas at 0ºC and 1.0 atm?

  39. More (IV) Practice • If we have 0.072 g of FeCl3 then how many moles are there?

  40. Do Now:

  41. Do Now: • Be certain to continue working on your homework! • Need help? Come to tutoring… • Pull out a pencil, piece of scratch paper, your periodic table, and a calculator that is ONLY a calculator!

  42. SLO Administration: • Diagnostic • If you don’t know, don’t answer it will alter your data • Do the best you can and TAKE your time—you do KNOW some of this! • Good Luck! 

  43. Do Now: • Solve the following molar mass/ conversion problems: • Molar Mass of CaCl2 • How many grams are in 7.3 mol of Ti(NO3)2? • How many mols are in 123.8 L of H2 gas at STP? • How many grams of FeCl3 are in 7.214  1024molecules?

  44. Last Minute—Student Presentations • Pull out your timeline and your pencil • Let’s be attentive quickly…So we can play!

  45. The Return of… • Two Groups • Get Ready to determine the “Molar Massters” of the class! • Write your answer on a whiteboard—all must have the correct answer in a group to earn the point! • Flip over to show your classmates • Ready…set…let’s start!

  46. Let’s Play! 1. Number of atoms in 0.500 mole of Al a) 500 Al atoms b) 6.02 x 1023 Al atoms c) 3.01 x 1023 Alatoms 2.Number of moles of S in 6.02 x 1023S atoms a) 1.0 mole S atoms b) 3.0 mole S atoms c) 1.1 x 1048 mole S atoms

  47. Molar Mass! Find the molar mass (usually we round to a whole number) • 1 mole of Br atoms • 1 mole of Sn atoms = 80.0 g/mole = 119 g/mole

  48. Molar Mass II • Molar Mass of K2O = ? Grams/mole B. Molar Mass of antacid Al(OH)3 = ? Grams/mole

  49. Molar Mass Challenge Prozac, C17H18F3NO, is a widely used antidepressant that inhibits the uptake of serotonin by the brain. Find its molar mass.

  50. Converting Moles and Grams Aluminum is often used for the structure of light-weight bicycle frames. How many grams of Al are in 3.00 moles of Al? 3.00 moles Al ? g Al

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