1. Drill: Calculate the osmotic pressure of 5
Drill: Calculate the osmotic pressure of 5.0 g NaOH in 7500 mL soln at 27oC.

2. Drill: Calculate the heat change when 25. 0 g of H2O goes from 66
Drill: Calculate the heat change when 25.0 g of H2O goes from 66.3oC to 26.3oC. Cwater = 4.18 J/gK

3. Review Drill & Collect Labs

4. CHM II HW
Review PP-19
Work the attached problem & turn it in tomorrow.

5. Chemical Kinetics or Reaction Rates

6. Reaction Rate
The speed at which reactants become products in a chemical reaction
M/s = mole/Ls

7. Kinetic Theory All matter is made up of tiny particles
The particles are in constant motion
All collisions are elastic ?

8. Elastic Collisions
Collisions in which there is no energy change

9. Particles Reacting For particles to react, they must collide
Reaction rate is dependent on collision rate

10. Particles Reacting
When a reaction takes place, an energy change occurs
Collisions (in which reactions occur) are not elastic

11. Reaction Rate
Rate = - d[Reactant]/dt
Rate = +d[Product]/dt
M/s

14. Factors Affecting Rxn Rate
Concentration, Temperature, Agitation, Process, Orientation, Catalyst, SA of Solid, Pressure of Gas, Reaction Mechanism

15. List & describe at least 5 factors that will affect reaction rates
Drill:
List & describe at least 5 factors that will affect reaction rates

17. Rate Expression
An equation showing how rate depends on the number of reactants in a rate determining reaction

18. Rate Expression Rxn: aA(aq) + bB(aq) P Expr: Rate = k[A]a[B]b
[A] = molarity of A

19. Rate Expression
Rxn: aA(g) + bB(g)
Product
Exp: Rate = kPAaPBb

20. Write Rate Expressions for:
H2(g) + N2(g) NH3(g)
HCl(aq) + Ba(OH)2(aq)
BaCl2(aq) + H2O (l)

21. Write Rate Expressions for:
H2(g) + N2(g) NH3(g)
Rate = k(PH2)3(PN2)

22. Write Rate Expressions for:
2HCl(aq) + 1Ba(OH)2(aq)
1BaCl2(aq) + 2H2O (l)
Rate =
k[HCl]2[Ba(OH)2]

23. Write Rate Expressions for:
1 Cl2(g) + 1 HOOH (aq)
2 HOCl(aq)

24. Write Rate Expressions for:
1 Cl2(g) + 1 HOOH (aq)
2 HOCl(aq)
Rate = k(PCl2) or
Rate = k[HOOH]

25. Drill: Write the rate expression & determine rxn order for:
SO2(g) + O2 (g)
SO3(g)

26. Drill: Write the rate expression & determine rxn order for:
2 SO2(g) + 1 O2 (g)
2 SO3(g)
Rate = k(PSO2)2(PO2)

27. Review & Collect Drill & HW

28. CHM II HW
Review PP-19.
Complete the attached assignment & turn it in tomorrow.

29. A Make-up Test for the test will be attached to Poly’s website, and for those who missed the test or want to improve their grade. The test is due tomorrow morning by 8:15 am.

30. Write the Rate Law for: 2A(aq) + B(aq) + 3C(s) Products

31. Write the Rate Law for: 2A(aq)+ B(aq)+ 3C(s) P Rate = k[A]2[B]

32. Reaction Order The total number of reactants (coefficients)
Equals total exponents in rate expression

33. Determining Rxn Order Find rate expression ratios
(Ratio of concentrations)x = rate ratio
x = exponent

34. Write the rate expression for:
aA + bB
Products
All aqueous

35. The next slide includes data from an experiment where various concentrations of A & B were added together, and the rates of product formation was measured.

36. Experimental Results Exp [A] [B] Rate 1 1.0 1.0 2 2 2.0 1.0 4

37. Experimental Results Exp [A] [B] Rate 1 1.0 1.0 2 2 2.0 1.0 4

38. Write the rate expression for:
aA + bB + cC
Products
All aqueous

39. Experimental Results Exp # [A] [B] [C] Rate 1 0.1 0.1 0.1 3

40. Experimental Results Exp # [A] [B] [C] Rate 1 0.1 0.1 0.1 3

41. Solve All: Exp Data: Exp # [R] [S] [T] Rate 1) 0.25 0.20 0.10 21) 2) 3) 4)

42. Drill: Solve All Exp Data:
Exp # [R] [S] Rate 1) 2) 3)

43. Solve All: Exp Data: Exp # [R] [S] Rate 1) 0.25 0.20 2 2) 0.25 0.60 181) 2) 3)

44. Review Drill, Check HW, & Collect Lab

45. CHM II HW
Review PP-19

48. Clausius-Claperon Eq
(T2)(T1) k2
(T2 – T1) k1
Ea= R ln

49. Calculate the activation energy of a reaction whose rate constant is 2
Calculate the activation energy of a reaction whose rate constant is 2.0 x 103 at 27oC and is 2.0 x 106 at 77oC:

50. List & describe at least 5 factors that will affect reaction rates
Drill:
List & describe at least 5 factors that will affect reaction rates

51. Review & Collect Drill & HW

52. CHM II HW
Review PP-19 & 20
Complete the attached assignment & turn it in tomorrow.

53. Half-Life
The time required for one half of the reactants to change into products in a reaction

55. Useful Relationships
Rxn Order Rate Exp
R=k
R=k[A]
R=k[A]2

56. 1st Order Age Dating Formula
t = ln(Ai/Af)t1/2
0.693

57. The sequence of steps that make up the reaction process
Reaction Mechanism
The sequence of steps that make up the reaction process

59. Reaction Mechanism Step 1 A <--> B fast Step 2 B ---> C slow
Step 3 C <--> D fast
Total A ---> D

60. The rate determining step in a reaction mechanism is the slowest step

61. To solve the rate expression, you must use the slowest step
Reaction Mechanism
To solve the rate expression, you must use the slowest step

62. Solve Rate Expression A + B C + D fast 2C + A G fast 2D + B K fast
2G + 2K Prod. slow

63. Solve Rate Expression X + Y M + N fast M + N 2G slow 2N + G K fast
2G + 2K Prod. fast

64. Solve All: Exp Data Exp # T [A] [B] Rate 1) 27oC 0.10 0.10 2

66. Solving Rxn Exponent = = Rate2 k [IO3-]x[S2O5-2]y
M/31 s k(0.10M)x(0.10M)y
M/66 s k(0.10M)x(0.05M)y = =

68. [Z]
Abs 640
0.1
0.66
0.075
0.495
0.05
0.33
0.025
0.165
0.01
0.066

70. Drill: Solve Rate Expr:
X + Y M + N fast
3M + N G fast
2N K fast
2G + K Prod. slow

71. Review Drill & Check HW

72. CHM II HW
Review PP-19
Complete the attached worksheet & turn it in tomorrow
Lab Thursday

73. CHM II HW
Problems: 65 & 69
Page: 704

74. AP CHM HW
Problems: 61 & 63
Page: 337

75. Rate Law & Net Rxn A + B C + D fast 4C + A 2G fast 4D + B 2K fast
G + K Q + W slow
Q + 2 W Prod. fast

76. Review

77. Drill: Determine All Exp # T [A] [B] Rate 1) 27oC 0.10 0.10 2

78. Solve Rate Expression A + B C + D fast 4 C + A 2G fast 2 K 4D + B fast
G + K Q + W fast
2Q + 2W Prod. slow