Le Chatelier's Principle

Define Le Chatelier’s principle


  • Chemical reactions are reversible in closed systems.
  • Equilibrium: The state reached when the rate of forward and reverse reactions in a closed system become equal.
  • Equilibrium systems are represented as the simultaneous forward and reverse reactions using the symbol:
  • Equilibrium systems can be affected by changes made to the system.
  • Le Chatelier’s principle can be used to predict changes in equilibrium systems.
  • Le Chatelier’s principle can be stated as follows:
“When a change is made to an equilibrium system, the system moves to counteract the imposed change and restore the system to equilibrium.”


Henry Louis Le Chatelier

Easychem - Le Chatelier's Principle

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