Chemistry 12

UNIT TWO - Reaction Kinetics

A: Reaction Kinetics (Introduction)

A1. give examples of reactions proceeding at different rates
A2. describe rate in terms of some quantity (produced or consumed) per unit of time
A3. experimentally determine rate of a reaction
A4. identify properties that could be monitored in order to determine a reaction rate
A5. recognize some of the factors that control reaction rates
A6. compare and contrast factors affecting the rates of both homogeneous and heterogeneous rxns
A7. discuss situations in which the rate of reaction must be controlled

B: Reaction Kinetics (Collision Theory)

B1. demonstrate an awareness of the following:
  • reactions are the result of collisions between reactant particles
  • not all collisions are successful
  • sufficient kinetic energy (KE) and favorable geometry are required
  • to increase the rate of a reaction one must increase the frequency of successful collision
  • energy changes are involved in reactions as bonds are broken and formed

B2. describe the activated complex in terms of its potential energy (PE), stability, and structure
B3. define activation energy
B4. describe the relationship between activation energy and rate of reaction
B5. describe the changes in KE and PE as reactant molecules approach each other
B6. draw and label PE diagrams for both exothermic and endothermic reactions, including D H, activation energy, and the energy of the activated complex
B7. relate the sign of D H to whether the reaction is exothermic or endothermic
B8. write a chemical equation including the energy term (given a D H value) and vice versa
B9. describe the role of the following factors in reaction rate:

C: Reaction Kinetics (Reaction Mechanisms and Catalysts)

C1. use examples to demonstrate that most reactions involve more than one step
C2. describe a reaction mechanism as the series of steps (collisions) that result in the overall rxn
C3. define catalyst
C4. compare and contrast the PE diagrams for a catalyzed and uncatalyzed reaction in terms of:
    • reaction mechanism
    • D H
    • activation energy

C5. identify reactant, product, reaction intermediate, and catalyst from a given reaction mechanism
C6. describe the uses of specific catalysts in a variety of situations

 

 

Lesson Plan - Unit Two

Period #1 Intro To Reaction Kinetics

Materials : Textbook : Chemistry 12 - Hebden

Handout on Factors Affecting Reaction Rates

Review :

Objectives : students should be able to :

A1. give examples of reactions proceeding at different rates

A2. describe rate in terms of some quantity (produced or consumed) per unit of time

A3. experimentally determine rate of a reaction

A4. identify properties that could be monitored in order to determine a reaction rate

A5. recognize some of the factors that control reaction rates

A6. compare and contrast factors affecting the rates of both homogeneous and heterogeneous reactions

A7. discuss situations in which the rate of reaction must be controlled

 

Part I - Chem 11 Review for 1/2 of the period - see previous unit lesson plan :

Part II - Reaction Kinetics - Introduction and Notes :

Discuss, and give examples of reactions that proceed at different rates. Have students give several examples demonstrating differences in reaction rates. (A1)

Define reaction kinetics as the study of rates of reactions and the factors which affect the rates.

Give notes on page 2-1 on the "Measurement of Reaction Rates" and discuss rate in terms of some quantity produced or consumed per unit time. (A2)

Do question 6 on page 3 of Hebden to determine the rate of a reaction experimentally. (A3, A4) will do exp. 18C class after next also

Give example of "quantities" that can be measured. (colour change, temperature change, pressure change, mass change, volume change, concentration change, pH or conductivity change) (A4)

Do Example on page 2-2 to determine reaction rate.

Relate rate of reaction to the slope of concentration vs time graph. Give notes and go through example on page 2-3.

Define Heterogeneous and Homogeneous Reactions. Handout notes on page 2-4 "Factors Affecting Reaction Rates", and relate to homogeneous and heterogeneous reactions. (A6) Make a note that any of these factors that can be manipulated during a reaction can be used to control the reaction rate. (A5) For example if you can decrease the temperature and pressure of a reaction, then the rate will be slowed down..

Discuss situations in which the rate of reaction must be controlled (A7) page 2-5.

Exercise :

Questions 1-5 page 2 of Hebden.

Questions 7-9 page 5 of Hebden

Questions 10-11 page 7 of Hebden

Questions 12-14 page 8 of Hebden

Questions 15-17 pages 9, 10 of Hebden

Questions 18-19 page 11 of Hebden

Evaluation :

Unit Two Exam

Homework Checks

Lab 18 C

Assignment #1

 

Lesson Plan - Unit Two

 

Period #2 Unit 1 Test & Reaction Kinetics - Collision Theory and Potential Energy Diagrams

Materials : Textbook : Chemistry 12 - Hebden

Unit 1 Exam, Handout on Factors Affecting Reaction Rates

Handout on Endothermic and Exothermic Reactions

Review : Go over questions from Homework, and factors affecting reaction rates

Objectives : students should be able to :

B1. demonstrate an awareness of the following:

B2. describe the activated complex in terms of its potential energy (PE), stability, and structure
B3. define activation energy
B4. describe the relationship between activation energy and rate of reaction
B5. describe the changes in KE and PE as reactant molecules approach each other
B6. draw and label PE diagrams for both exothermic and endothermic reactions, including D H, activation energy, and the energy of the activated complex
B7. relate the sign of D H to whether the reaction is exothermic or endothermic

B8. write a chemical equation including the energy term (given a D H value) and vice versa

 

Part I - Chem 11 Review - UNIT TEST :

Students write Unit One Test

Part II - Reaction Kinetics - Collision Theory :

Give notes on page 2-5 on the "Kinetic Collision Theory of Reaction Rates." Explain the following statements (B1)

 

Review Endothermic and Exothermic reactions (give handout of definitions and summary). (B7), (B8)

Discuss Kinetic Energy Distributions and how they relate to temperature. Show overhead. Give notes on page 2-5, "Kinetic Energy Distributions".

Define Kinetic Energy and Potential Energy as related to particles in a system(B5).

Describe the activated complex in terms of its potential energy ,stability, and structure and define activation energy, give notes on page 2-5, and show Orientation Overhead.

Discuss the reversible nature of reactions and demonstrate using a Potential Energy Diagram.

 

Exercise :

Questions 20-22 page 12 of Hebden.

Questions 24-28 page 16 of Hebden

Prep for lab 18 C

Evaluation :

Unit One Exam

Homework Checks

Lab 18 C

Assignment #1

Lesson Plan - Unit Two

 

Period #3 - Lab 18 C and Collision Theory Explanation

Materials : Textbook : Chemistry 12 - Hebden, Chemistry Laboratory Experiments - Heath

Hand back Unit 1 Exam,

Review : Go over questions from Homework and Unit 1 Test

Objectives : students should be able to :

B2. describe the activated complex in terms of its potential energy (PE), stability, and structure
B3. define activation energy
B4. describe the relationship between activation energy and rate of reaction
B5. describe the changes in KE and PE as reactant molecules approach each other
B6. draw and label PE diagrams for both exothermic and endothermic reactions, including D H, activation energy, and the energy of the activated complex

B9. describe the role of the following factors in reaction rate:

 

Part I - Experiment 18 C - Measuring Reaction Rate Using Volume of Gas Produced :

Students complete pre-lab questions

Students do experiment 18 C including all questions and follow up questions. Lab will be due in two periods. (A3)

Part II - Reaction Kinetics - Collision Theory :

 Discuss how the Collision Theory can explain how the following factors effect reaction rates. Notes on page 2-6. (B9)

 

Exercise :

Questions 20-22 page 12 of Hebden.

Questions 24-28 page 16 of Hebden

 

Evaluation :

Unit One Exam

Homework Checks

Lab 18 C

Assignment #1

Lesson Plan - Unit Two

 

Period #4 - Review thus far & Reaction Mechanisms

 

Materials : Textbook : Chemistry 12 - Hebden

Review : Go over questions from Homework

Objectives : students should be able to :

  C: Reaction Kinetics (Reaction Mechanisms and Catalysts)

C1. use examples to demonstrate that most reactions involve more than one step

C2. describe a reaction mechanism as the series of steps (collisions) that result in the overall reaction

C3. define catalyst

C5. identify reactant, product, reaction intermediate, and catalyst from a given reaction mechanism.

C5. identify reactant, product, reaction intermediate, and catalyst from a given reaction mechanism

C6. describe the uses of specific catalysts in a variety of situation

 

Part I - Review Thus Far - :

Go through a quick review of reaction kinetics thus far, include measuring rate, kinetic collision theory, kinetic energy distributions, potential energy diagrams, activation energy and activated complex.

Part II - Reaction Mechanisms - Reaction Mechanisms Intro and Notes :

Write the combustion of glucose on the board and discuss the unlikelyhood of a multi-particle collision resulting in the formation of products.(C1)

Explain what a reaction mechanism is and how it can be broken down into two particle collisions (C2), give notes on page 2-17 and go through example of the combustion of HBr.

 

Exercise :

Questions page of Hebden.

 

Evaluation :

Unit One Exam

Homework Checks

Assignment #1

Lesson Plan - Unit Two

Period #5 - Reaction Mechanisms and Catalysts

Materials : Textbook : Chemistry 12 - Hebden

Review : Go over questions from Homework

Objectives : students should be able to :

 

C: Reaction Kinetics (Reaction Mechanisms and Catalysts)

C1. use examples to demonstrate that most reactions involve more than one step

C2. describe a reaction mechanism as the series of steps (collisions) that result in the overall reaction

C3. define catalyst

C4. compare and contrast the PE diagrams for a catalyzed and uncatalyzed reaction in terms of:

C5. identify reactant, product, reaction intermediate, and catalyst from a given reaction mechanism

C6. describe the uses of specific catalysts in a variety of situation

 

Part I - Reaction Mechanisms - Reaction Mechanisms Intro and Notes :

 

 

Part II - Reaction Kinetics - Catalysts :

 

 

Exercise :

Questions page of Hebden.

 

Evaluation :

Unit One Exam

Homework Checks

Assignment #1

Lesson Plan - Unit Two

 

Period #6 - Unit Two Review & Intro To Equilibrium

 

Materials : Textbook : Chemistry 12 - Hebden

Assignment #1

Unit Review Questions

Review : Go over questions from Homework

Objectives : students should be able to :

Meet all the learning outcomes for Unit Two

D: Dynamic Equilibrium (Introduction)

D1. describe the reversible nature of most chemical reactions
D2. identify the reversible pathways of a chemical reaction on the PE diagram

D3. relate the changes in rates of the forward and reverse reactions to the changing concentrations of the reactants and products as equilibrium is established
D4. describe chemical equilibrium as a closed system at constant temperature:

D5. describe the dynamic nature of chemical equilibrium

Part I - Reaction Kinetics - Unit Review and Assignment #1

Students will complete the Unit Review and work on Assignment #1, due at the beginning of the period that the Unit Test is written.

If finished early, start introduction to Equilibrium - Unit 3.

Exercise :

Unit Review Package

Assignment #1

Evaluation :

Unit Two Exam

Assignment #1

 

Part II - Intro To Dynamic Equilibrium - Introduction :

See Period One of Unit 3 - Dynamic Equilibrium