This document outlines 3 main concepts regarding chemical equilibrium: 1) how to write and use the equilibrium constant K, noting that K depends only on temperature, 2) how to apply Le Chatelier's principle to predict the direction a system shifts in response to changes in conditions, and 3) how to perform equilibrium calculations using ICE tables to find K or equilibrium concentrations/partial pressures.

1. Chemical Equilibrium
3 main concepts:
• Equilibrium constant
2. Le Chatelier Principle
3. Equilibrium Calculations

2. Chemical Equilibrium
1. Equilibrium constant
• Write K expression (with units)
Note:
• Solids and liquids do not appear in K expressions.
• K is only dependent on T! Changes in p, V,
concentrations do not affect K.

3. Chemical Equilibrium
2. Le Chatelier Principle
• Predict direction of shift in POE with change in
conditions (conc, pressure, temperature, catalyst)
• Explain using LCP
Note:
• In explain your prediction (POE shifts right/ left),
remember to explain using LCP!

4. Chemical Equilibrium
3. Equilibrium Calculations
• Construct ICE table
• Calculate K
or equilibrium concentrations of reactants/ products

5. Chemical Equilibrium
3. Equilibrium Calculations
Note:
• ICE table can be in terms of moles, conc. or partial
pressure.
• If table is in terms of moles, remember to divide by
volume when calculating K!!