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Le Chatelier’s Principle
When a system at equilibrium is subjected to a stress, the system will shift in a way that relieves the stress and reestablishes equilibrium.
What can “stress” a chemical reaction?
Changes in concentration
Changes in temperature
Changing Concentrations
Changes value of Q
Add reactant or remove product
Decreases Q
What happens when Q is decreased?
The reaction wants to run forward to reach equilibrium
Remove reactant or add product
Increases Q
What happens when Q is increased
The reaction wants to run in reverse to get back to equilibrium