1. Chapter 8 Factor Label Method and the Mole

2. What is Avogadro’s Favorite Novel?

3. Molby Dick

4. An equality is a ratio is a conversion factor. 1.61 km = 1 mile 1 pound = 0.4536 kilograms Density of Aluminum = 2.7 g/cm 3 Land speed record = 763 miles/hr

5. What Do We Know About the Mole

6. 1 mol = 6.02 x 10 23 _________

7. What Do We Know About the Mole 1 mol = 6.02 x 10 23 particles Any equality or ratio can be made into a conversion factor and then used to solve problems with the factor label method.

8. 6.02 x 10 23 “particles” 1 mole or 1 mole 6.02 x 10 23 “particles” Note that particles could be atoms, molecules, formula units, ions, etc. Avogadro’s Number as a Conversion Factor

9. = 6.02 x 10 23 C atoms = 6.02 x 10 23 H 2 O molecules = 6.02 x 10 23 NaCl “molecules” (technically, ionic compounds are not molecules, they are called formula units) A Mole of Particles A Mole of Particles Contains 6.02 x 10 23 particles 1 mole C 1 mole H 2 O 1 mole NaCl

10. 1 mol Na + = ? 1 mol SO 4 2- = ? 6.02 x 10 23 Na + ions 6.02 x 10 23 SO 4 2- ions

11. What Do We Know About the Mole

12. 1 mol of any substance = it’s gfm

13. 1 mole of C atoms= 12.0 g Gram Formula Mass (Molar Mass) of an atom

14. 1 mole of Mg atoms Gram Atomic Mass (Molar Mass) of an atom 24.3 g 6.02 x 10 23 Mg atoms

15. 1 mole of Cu atoms Gram Formula Mass (Molar Mass) of an atom 63.5 g 6.02 x 10 23 Cu atoms

16. Gram Formula Mass (Molar Mass) of Molecules and Compounds

17. What is the mass of 1 mol of calcium phosphate? Gram Formula Mass of Ca 3 (PO 4 ) 2 3 x 40.1 = 120.3 2 x 31.0 = 62.0 8 x 16.0 = 128.0 = 310.3 g/mol = 6.02 x 10 23 Ca 3 (PO 4 ) 2 formula units Gram Formula Mass (Molar Mass) of Molecules and Compounds

18. List “2” things you know about a mole of H. 1 mole H = 6.02 x 10 23 H atoms 1 mole H = 1.0g What could we use these equalities to do in a factor label problem?

19. List “2” things you know about a mole of H 2 O 1 mole H 2 O = 6.02 x 10 23 H 2 O molecules 1 mole H 2 O = 18.0g

20. List “2” things you know about a mole of Na 2 O 1 mole Na 2 O = 6.02 x 10 23 Na 2 O formula units 1 mole Na 2 O = 62.0g

21. Converting Moles and Grams Aluminum is often used for the structure of light-weight bicycle frames. How many grams of Al are in 8.62 moles of Al? a

22. 1 mole Al = ?

23. 1 mole Al = 27.0 g Al

24. What are the conversion factors?

25. 1 mole Al = 27.0 g Al 27.0g Al or 1 mol Al 1 mol Al 27.0 g Al What are the conversion factors?

26. 1 mole Al = 27.0 g Al 27.0g Al or 1 mol Al 1 mol Al 27.0 g Al What are the conversion factors? Aluminum is often used for the structure of light-weight bicycle frames. How many grams of Al are in 8.62 moles of Al?

27. 1 mole Al = 27.0 g Al Conversion factors for Al 27.0g Al or 1 mol Al 1 mol Al 27.0 g Al 8.62 moles Al

28. 1 mole Al = 27.0 g Al Conversion factors for Al 27.0g Al or 1 mol Al 1 mol Al 27.0 g Al 8.62 moles Al 27.0 g Al 1 mole Al = 233 g Al

29. How many Al atoms are in the bicycle frame?

30. 8.62 moles Al

31. How many Al atoms are in the bicycle frame? 8.62 moles Al 1 mole Al

32. How many Al atoms are in the bicycle frame? 8.62 moles Al 1 mole Al 6.02 x 10 23 Al atoms

33. How many Al atoms are in the bicycle frame? 8.62 moles Al 1 mole Al = 5.19 x 10 24 Al atoms