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Drill: Name & describe each of the 7 crystal structures

Drill: Name & describe each of the 7 crystal structures. Drill: Draw LDDs for:. BF 3 NH 3 BeCl 3 C 3 H 6 H 3 PO 4 H 2 CO 3. Drill: Draw LDDs for:. C 6 H 8. Drill: Draw LDD for:. C 3 H 5 NO. CHM II. Test Friday. CHM II HW. Read: Chapter 14 Work Problems 25 & 29 on page 585.

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Drill: Name & describe each of the 7 crystal structures

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  1. Drill: Name & describe each of the 7 crystal structures

  2. Drill: Draw LDDs for: BF3 NH3 BeCl3 C3H6 H3PO4 H2CO3

  3. Drill: Draw LDDs for: C6H8

  4. Drill: Draw LDD for: C3H5NO

  5. CHM II • Test Friday

  6. CHM II HW • Read: Chapter 14 • Work Problems 25 & 29 on page 585

  7. Solutions

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

  9. Solute • Substance being dissolved • Portion in lesser molar amount

  10. Solvent • Substance doing the dissolving • Portion in greatest molar amount

  11. Colloid • Slightly larger particles • Light passes & particles stay suspended

  12. Suspension • Even larger particles • Particles block or reflect light

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

  14. Size Comparison • Solution < Colloid • Colloid < Suspension

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

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

  17. Concentration • The amount of solute dissolved into solution

  18. ConcentratedSolution • A solution with a relatively large amount of solute dissolved

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

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

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

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

  23. Solution Measures • Concentration • Molarity • Molality • Mole Fraction

  24. Percent Solution • Mass of one portion per the total mass, all times 100 % • %soln = ma/mtotal x 100 %

  25. Drill: • Define & give units for: • Molarity • Molality • Mole Fraction

  26. Molarity • Moles of solute per liter of solution • M = molessolute/Lsoln

  27. Molality • Moles of solute per kilogram of solvent • mo = molessolute/kgsolvent

  28. Mole Fraction • Moles of one portion per total number of moles in the solution • X = molesa/molessoln

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

  30. Calculate the molality of 69 g of C2H5OH dissolved in 500.0 mL of water

  31. Calculate the mole fraction of each portion when 92 g of C2H5OH dissolved in 144 mL of water

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

  33. Review DrillReview HW

  34. Calculate the molality & mole fraction of a solution containing 46 g of C2H5OH dissolved in 1782 mL of water

  35. Chm II HW Problems: 31 & 38 Page: 585 & 586

  36. AP Chm HW Problems: 31 & 35 Page: 298

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

  38. Examples • Vapor pressure • Boiling & Freezing points • Osmotic pressure

  39. Vapor Pressure • VPsolution = (VPsolvent)(Xsolvent) • X = mole fraction • VP = vapor pressure

  40. Boiling & Freezing DT = imoK DT = change in BP or FP i = ionic activity K = BP or FP constant

  41. Osmotic Pressure p = iMRT p = osmotic pressure i = ionic activity M = Molarity

  42. Calculate the vapor pressure of a solution containing 150 g C5H10O5 in 162 mL of water at 30oC

  43. Drill: • Calculate the VP of a solution containing 36 % m/m glucose (C6H12O6) in water at 29oC: • (VPwater = 30.0 mm Hg)

  44. Calculate BP & FP of 60.0 g of NaOH in 250 mL waterKBP = 0.512oC/moKFP = -1.86oC/mo

  45. Calculate the osmotic pressure of a solution containing 12 g of NaOH dissolved in 250 mL solution at 27oC

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

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

  48. Calculate the vapor pressure of a solution containing 120 g C3H7OH in 144 mL of water at its BP.

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