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Lesson 1: Introduction to Chemical Equilibrium |
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Assignments & Research |
The concept of reversible chemical reactions is introduced. |
Simple demonstrations (see the Teacher Lab section for suggetions) may be performed to demonstrate the concept of reversible reactions. |
A graphing assignment (Assignment 1) is included in these resources. This exercise is used to introduce the concept that at equilibrium the rate of the forward reaction equals the rate of the reverse reaction. It is recommended that a spreadsheet program be used to create the graph. |
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Lesson 2: The Equilibrium Constant |
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| The equilibrium constant, Keq, is introduced. The importance of this expression should be emphasized, as it will be used extensively in the units on Solutions and Acids and Bases. |
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Practice questions for Sections 2.1 and 2.2 and Assignment 2 (Section 2.2) |
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Lesson 3: Le Châtelier's Principle |
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Assignments & Research |
| While introducing the concept of Le Châtelier's Principle the teacher may find it useful to review the key factors that influence the rate of a reaction. Since equilibrium is a balance between the rates of the forward and reverse reactions, factors that affect these rates (notable concentration, pressure/volume, and temperature) will affect the equilibrium system. | Lab Activity: Le Châtelier's Principle | There are several practice exercises provided for this section. Assignment 3: Le Châtelier's Principle Research assignment on the Haber Process (Assignment 4). As an optional extension students may create a multimedia presentation, web page, or select another method of presenting their findings. |
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Lesson 4: Equilibrium & Spontaneity |
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Assignments & Research |
This section refers back to Unit 1, Section 3.3 Gibbs Free Energy, an optional topic. |
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Terms to Know
equilibrium |
open system |
equilibrium constant |
reversible reaction |
Keq |
steady state |
Le Châtelier's Principle |