1. 3/11/2013 Standards: 6 (Solutions) Objectives: ● Students will be able to calculate problems involving Molarity (M) and molality (m) DO NOW: 1. Calculate M (molarity) of a solution with 4.7 L of solution in which there are 2.2 mol of NaClO4 HOMEWORK: 1. Ch 15.2 PP's p. 466 17-20 and Ch 15 Assess. p. 485 76 (a, b, & c) 5 pts (Std 6) 2. Two PRINTS (see website) 3. HANDOUTS TODAY - Tutorial Ch 15.1 - What Are Solutions, Ch 15.2 - Molarity - Molality - Colligative Properties Std 6 =========================================================== STAMPS: ● Journal 3/8 1. App A, p. 880 1-2 (1 pt) Std 6 2. Ch 15.2 p. 464-465 PP's 11-16 (4 pts) Std 6

3. Units of measure in Henry's Law S (solubility) g/L g/mL mol/L mol/mL (or any unit of volume besides L or mL) P (pressure) atm, mmHg, Torr, kPa, Pa, psi (any unit of pressure is OK)

4. http://group.chem.iastate.edu/Greenbowe/sections/proje ctfolder/ flashfiles/thermochem/solutionSalt.html SOLVATION ANIMATION 1. agitation 2. increase surface area 3. temperature Demo -see videomade in classyesterdayDemo -see videomade in classyesterday

6. Units of measure in Henry's Law S (solubility) g/L g/mL mol/L mol/mL (or any unit of volume besides L or mL) P (pressure) atm, mmHg, Torr, kPa, Pa, psi (any unit of pressure is OK)

7. M Molarity

8. M = mol L molarity solute solution

9. Calculate the molarity of a solution having 15.0 g NaCl in 2.80 L of water (volume of solution is still 2.80 L). Molar mass Cl = 35.5 Molar mass Na = 23.0 In your answer, use 3 sig. figs and do not use any units of measure. NUMBER ONLY 1

10. m = (milli-) = 1 1000 How to derive equality with prefixes What is 1 mL equal to in terms of L ? 1 1000 mL = L x 1000 1000 x 1 1000 mL = L x 1000 1000 x 1000 mL = 1 L 1 1000 mL = L

11. k = (kilo-) = 1000 1 kg = 1000 g How to derive equality with prefixes What is 1 kg equal to in terms of g ?

12. Summary Is it 1000 kg = 1 g or 1000 g = 1 kg ? prefix letter x its mass unit (or volume) 1 kg = 1000 g 1 1000 1 mL = L 1 mg = g 1 1000 1 kL = 1000 L prefix value x its mass unit Make -- = PREFIXES

13. 1 kg = 1000 g 1 mL = L 1 1000 Everything in blue will be a fraction. Everything in green will be a fraction.

14. http://mrwiggersci.com/chem/Tutorials/conv-units-all- prefixes.htm Big Bigger

15. M Molarity

16. 2What is the value of S if 25.0 g of gas is dissolved in 1.00 L of water? Number only 3 sig figs only no units of measure

17. 3What is the solubility of a gas if 25.0 g of the gas will dissolve in 1.00 L of water. Number only 3 sig figs only no units of measure

18. p. 463 possible solutes: a. salt (NaCl) b. sugar (sucrose) c. MgCl 2 d. C (smaller portion of steel) e. paint pigments possible solvents: f. water g. iron (Fe major portion of steel) h. laquer thinner `

19. 3/13/2013 Standards: 6 (Solutions) (same as yesterday) Objectives: ● Practice Calculations of molarity and mass percent DO NOW: 1. Ch 15 Assess - p. 484 69-71 and 77 (all) & 78 (all) will be stamped as a 5 pt HW stamp for Th. (5 pts) Std 6 HOMEWORK: None =========================================================== STAMPS: ● Journal 3/11 1. Ch 15.2 PP's p. 466 17-20 and Ch 15 Assess. p. 485 76 (a, b, & c) 5 pts (Std 6) AT YOUR DESK: 1. Two PRINTS (see website) (Bigger - Units of Measure, and Mass% & Molarity Lab Sheet) (1 pts) Std 6

22. For Quiz 3.3 number correct x 2.4 = points earned 60 = total possible

23. Summary Is it 1000 kg = 1 g or 1000 g = 1 kg ? prefix letter x its mass unit (or volume) 1 kg = 1000 g 1 1000 1 mL = L 1 mg = g 1 1000 1 kL = 1000 L prefix value x its mass unit = Make -- PREFIXES

24. answers: 69. 3.9% 70. 33.6% 71. 25% 77. a. 0.02 M (mol/L) b. 0.27 M (mol/L) c. 0.0847 M (mol/L) 78.a. 0.02 M mol b. 0.00625 mol c. 0.648 mol

27. 3/13/2013 Standards: 6 (Solutions) (same as yesterday) Objectives: ● Practice Calculations of molarity and mass percent DO NOW: 1. Ch 15 Assess - p. 484 69-71 and 77 (all) & 78 (all) will be stamped as a 5 pt HW stamp for Th. (5 pts) Std 6 HOMEWORK: None =========================================================== STAMPS: ● Journal 3/11 1. Ch 15.2 PP's p. 466 17-20 and Ch 15 Assess. p. 485 76 (a, b, & c) 5 pts (Std 6) AT YOUR DESK: 1. Two PRINTS (see website) (Bigger - Units of Measure, and Mass% & Molarity Lab Sheet) (1 pts) Std 6

28. 3/14/2013 Standards: 6 (Solutions) Objectives: ● Students will be able to calculate boiling point INcreases, and freezing point DEcreases. ● Demonstrate conducive solutions. Students will be able to recognize compounds that ionize (make 2 or more particles, salts, acids & bases) as different from those who don't ionize (sugar). DO NOW: 1. Name 3 kinds of substances ionize in water, and give one example of each? HOMEWORK: 1. Ch 15 Assess p. 485 79 (a,b,c), Ch 15.4 p. 475 33, 34, Ch 15 Assess p. 485 87 (a,b,c) (5 pts ) Std 6 (total problems = 8) =========================================================== STAMPS: ● Journal 3/13 (for periods 1,3,5) or 3/14 (for periods 2,6) 1. Ch 15 Assess - p. 484 69-71 and 77 (all) & 78 (all) will be stamped as a 5 pt HW stamp for Th. (5 pts) Std 6 period 2 was in assemb ly, which I photogr aphed. It was on driving safely. Answers: 78 a = 0.0320 mol; b = 0.00625 mol ; c = 0.648 mol 79 a = 0.0859 g; b = 34.6 g; c = 5.91 g 87 a = fp = 10.2 deg C, bp = 103.8 deg C b = fp = -115.8 deg C, bp = 79.1 deg C c = fp = -1.0 deg C, bp = 83.3 deg C

31. m = molality = mole solute kg solvent M = molarity = mole solute L solution

32. Boiling & freezing points of water can be changed by dissolving: BP 100°C FP 0°C ionic compounds (salts, acids, bases) non-ionic compounds (like sugar that don't form ions)

33. p. 474 p. 472 More in the changes shown in charts BIGGERBIGGER particles changes

34. BP FP 100°C 0°C K b °C/m K f °C/m

36. p. 474 p. 472 More in the changes shown in charts BIGGERBIGGER particles changes

37. molaltiy mol (solute) kg (kg solvent) =

38. molaltiy mol (solute) kg (kg solvent) =

41. molaltiy mol (solute) kg (kg solvent) =

44. p. 474 p. 472 More in the changes shown in charts BIGGERBIGGER particles changes

45. 3/15/2013 Standards: 6 (Solutions) Objectives: ● Polish skills learned in this chapter DO NOW: 1. Due end of period (8 points): Directions: All problems require calculations. So, show given, find, and calculations. Each problem is worth one point. p. 484 67 1 x 10 1 atmp. 487 3 a 71 25% 4 c p. 48578 (b) 0.00625 mol 5 b 89 fp = -6.46 deg C bp = 101.8 deg HOMEWORK: Enjoy your week off and Think about Easter =========================================================== STAMPED: ● Journal 3/14 1. Ch 15 Assess p. 485 79 (a,b,c), Ch 15.4 p. 475 33, 34, Ch 15 Assess p. 485 87 (a,b,c) (5 pts ) Std 6

51. 3/14/2012 Standards: 6 (Solutions) Objectives: ● Complete data gathering and calculations of your mass% & molarity and turn in to basket before end of the period DO NOW: READ LAB SILENTLY AND try to figure out your procedure. HOMEWORK: Enjoy your week off and Think about Easter =========================================================== TURNED IN TO BASKET: ● Journal NONE TODAY

52. (for this lab, assume vol of solution = 20.00mL) 1.000 g = 1.000 mL (only for water) mass % = g solute g solution x 100 M = (molarity) mol (solute) L (solution)

53. When you come to me to get your salt, you will need to show me these masses: 1. filter paper 2. graduated cylinder 3. 50 mL beaker All masses must have 3 decimals Examples: 0.l56 g 0.033 g 3.427 g

54. Gp # g NaClg H20g solnMass %M 1 2 3 4 5 6 7 8 9 Mass % & Molarity LAB - RESULTS BY GROUP Per 1

55. Gp # gNaClg H20g solnMass %M 1 2 3 4 5 6 7 8 9 Mass % & Molarity LAB - RESULTS BY GROUP Per 2

56. Gp # gNaClg H20g solnMass %M 1 2 3 4 5 6 7 8 9 Mass % & Molarity LAB - RESULTS BY GROUP Per 3

57. Mass % & Molarity LAB - RESULTS BY GROUP Per 5 Gp # gNaClg H20g solnMass %M 1 2 3 4 5 6 7 8 9

58. Gp # gNaClg H20g solnMass %M 1 2 3 4 5 6 7 8 9 Mass % & Molarity LAB - RESULTS BY GROUP Per 6

59. Gp # gNaClg H20g solnMass %M 1 2 3 4 5 6 7 8 9 Mass % & Molarity LAB - RESULTS BY GROUP Per

60. Work problems p. 475 33-36