• Chemical equilibrium is the state of a system in which the rates of the forward reaction is equal to the rate of the reverse reaction.
  • equilibrium can be attained whether the reaction begins with all reactants and no products, all products and no reactants, or some of both.
  • At equilibrium, concentrations of all substances are constant.
  • The position of equilibrium is a property of the particular reversible reaction and does not depend upon how equilibrium was achieved.
  • A system must be closed, meaning no substances can enter or leave the system.
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