Reversible Reactions and Le Chatelier's Principle

  • Created by: Davwi
  • Created on: 22-02-19 10:04

Reversible Reactions

  • In a reversible reaction, the products can react again to form the reactants again.
  • As the reactants react, their concentrations fall- so the forward reaction will slow down. 
  • But as more and more products are made and their concentrations rise, the backward reaction would speed up.
  • After a while, the forward reaction will be going at exactly the same rate as the backward one- the system is going at equilibrium.
  • At equilibrium, both reactions are still happening, but there's no overall effect (it's at dynamic equilibrium). This means the concentrations of reactants and products have reached a balance and won't change.
  • Equilibrium is only reached if the reaction is in a closed system. A closed system is where none of the reactants or products can escape and nothing can get in.
  • When a reaction's at equilibrium, it doesn't mean the amounts of reactants and products are equal
  • If the equilibrium lies to the right, the concentration of products is greater than that of the reactants.
  • If the equilibrium lies to the left, the concentration of reactants is greater than the concentration of the products.
  • The position of equilibrium depends on the following conditions (as well as the reaction itself): the temperature, the pressure (this only effects equilibria…


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