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Unit 7/8:

Equilibrium

Goals of Units 7 and 8 Include:

Explain how K describes a system at equilibrium
Use K values (Ka, Kb, Ksp, etc.) and concentration information to solve equilibrium problems (i.e. determine the pH of a weak acid solution) AND use concentration information to solve for K values.
Explain the components of a buffer system, describe how to create a buffer, and predict how a buffer changes upon the addition of acids or bases
Explain how weak acid/base titrations are different from strong acid/base titrations, including describing what's in the flask at various points in a weak acid/base titration
Explain how using the value for Q allows you to predict an equilibrium position shift
Manipulating reactions a la Hess' Law, but using K values instead

Equilibrium Outline

Because this is such a big hoobie beast unit, we will be following the outline below. Primary Topics are Primary Topics for a reason - they are our most FUNDAMENTAL concepts. Secondary Topics are next - these are important as well, but not as critical. And the Final Topics are the "nice to know" ideas.

Introduction to Equilibrium
1. - Reading assignment
Primary Topics

- Writing equilibrium expressions
  - - Problem Set #1
- Calculating K from concentration information
  - - Problem Set #2
- Calculation concentration/pH from K
  - - Problem Set #3

Secondary Topics

- Common Ions
  - - Problem Set #4
- Buffers
  - - Definition
    - Henderson-Hasselbach equation
    - Preparation of a buffer
    - Problem Set #5
- Weak Acid/Strong Base OR Strong Acid/Weak Base titrations
  - - Half-equivalence point
    - Calculations of pH
    - Problem Set #6

Final Topics

- Reaction Quotient, Q
  - - Problem Set #7
- LeChâtelier’s Principle
- Manipulating K
  - - Problem Set #8
- Factors affecting solubility of insoluble salts
  - - Problem Set #9 – Practice FRQ

Unit 7/8 Equilibrium Videos

Supplemental Videos

Unit 7/8 Resources

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