1. Name & describe each of the 7 crystal structures

2. Drill: Draw LDD for: C 3 H 5 NO

3. Solutions

4. Solution Homogeneous mixture made up of at least one solute dissolved in the solvent

5. Solute Substance being dissolved Portion in lesser molar amount

6. Solvent Substance doing the dissolving Portion in greatest molar amount

9. Colloid Slightly larger particles Light passes & particles stay suspended

10. Suspension Even larger particles Particles block or reflect light

11. Tyndall Effect Because light reflects off suspended particles, the light ray can be seen from the side

12. Size Comparison Solution < Colloid Colloid < Suspension

13. Soluble When one substance (solute) dissolves in another (solvent)

14. Solubility The amount of one substance (solute) dissolved in another (solvent)

15. Concentrated Solution A solution with a relatively large amount of solute dissolved

16. Concentration The amount of solute dissolved into solution

17. Dilute Solution A solution with a relatively small amount of solute dissolved

18. Saturated Solution A solution with the maximum amount of solute dissolved in the solution

19. Unsaturated Solution A solution with less than the maximum amount of solute dissolved in solution

20. Supersaturated Solution A solution with greater than the maximum amount of solute dissolved in solution

21. Solution Measures Concentration –Molarity –Molality –Mole Fraction

22. Percent Solution Mass of one portion per the total mass, all times 100 % % soln = m a /m total x 100 %

23. Drill: Define & give units for: –Molarity –Molality –Mole Fraction

24. Molarity Moles of solute per liter of solution M = moles solute /L soln

25. Molality Moles of solute per kilogram of solvent mo = moles solute /kg solvent

26. Mole Fraction Moles of one portion per total number of moles in the solution X = moles a /moles soln

27. Calculate the molarity of a 250 mL solution containing 5.0 g NaOH dissolved in water

28. Drill: Calculate the mass of KI required to make 250 mL of 0.500 M KI.

29. Review Drill Review HW

30. Calculate the molality of 69 g of C 2 H 5 OH dissolved in 500.0 mL of water

31. Calculate the mole fraction of each portion when 92 g of C 2 H 5 OH dissolved in 144 mL of water

32. Calculate the molality & mole fraction of a solution containing 46 g of C 2 H 5 OH dissolved in 1782 mL of water

33. Chm II Homework: Problems: 25, 29, & 31 Page: 585

34. AP Chm HW: Problems: Page:

35. Colligative Properties Properties dependent only on the concentration of particles in solution

36. Examples Vapor pressure Boiling & Freezing points Osmotic pressure

38. Vapor Pressure VP solution = (VP solvent )(X solvent ) X = mole fraction VP = vapor pressure

39. Boiling & Freezing  T = i moK  T = change in BP or FP i = ionic activity K = BP or FP constant

40. Osmotic Pressure  = i MRT  = osmotic pressure i = ionic activity M = Molarity

41. Calculate the vapor pressure of a solution containing 150 g C 5 H 10 O 5 in 162 mL of water at 30 o C

42. Drill: Calculate the VP of a solution containing 36 % m/m glucose (C 6 H 12 O 6 ) in water at 29 o C: (VP water = 30.0 mm Hg )

43. Calculate BP & FP of 60.0 g of NaOH in 250 mL water K BP = 0.512 o C/mo K FP = -1.86 o C/mo

44. Calculate the osmotic pressure of a solution containing 12 g of NaOH dissolved in 250 mL solution at 27 o C

45. Calculate the vapor pressure of a solution containing 120 g C 3 H 7 OH in 144 mL of water at its BP.

46. Chm II Homework: Problems: 37, 47, & 87 Page: 585 - 587

47. AP Chm HW: Problems: 31, 35, & 39 Page: 298

48. Test on Thursday on Bonding, Lweis Dot Diagrams, & Solution Chemistry

49. Drill: Calculate the mass of lead(II)nitrate required to make 250 mL of 0.40 M Pb(NO 3 ) 2

50. Calculate the vapor pressure of a solution containing 12 g of C 4 H 8 O 4 dissolved in 50.0 mL solution at 27 o C (VP = 26.7 mmHg)

51. Clausius-Claperon Eq H v = R ln (T 2 )(T 1 ) P 2 (T 2 – T 1 ) P 1

52. VP benzene Temp ( o C) 24.5 27 73.5 127 Calculate H v for benzene:

53. Calculate the osmotic pressure of a solution containing 29.9 g of CoBr 3 dissolved in 7500 mL solution at 27 o C

54. Calculate the vapor pressure of a solution containing 12.0 g C 3 H 8 O in 14.4 mL of water at its BP.

55. Draw LDDs for: BH 3 NCl 3 CF 4 C 3 H 6 SO 3 SO 3 -2

56. Calculate the molality of a solution that is 33.1 % by mass Pb(NO 3 ) 2

57. Drill: Calculate the osmotic pressure of 0.88 g of CO 2 in 750 mL of soln at 27 o C

58. Test Tomorrow

59. 300 g C 3 H 6 NF was dissolved in 500 g C 6 H 12 O at 27 o C making a 0.800 g/mL solution. Calculate X, mo, M, , VP, BP, & FP.

60. 180 g C 3 H 8 O was dissolved in 180 mL H 2 O at 27 o C making a 1.5 g/mL solution. Calculate X, mo, M, , VP, BP, & FP.

61. A 1.2 g/cm 3 aqueous solution is 20.0 % by mass NaOH at 27 o C. Calculate: X, mo, M, , & MP

62. Calculate the molecular mass of a covalent compound dissolved in an aqueous solution to make it 25 % by mass when it boils at 102.048 o C

63. AP Homework: Read: Chapter 11 Power Point: 19

64. Chm II Homework: Read: Chapter 15 Power Point: 16