ChemicalEquilibrium

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Here are the basic procedures for solving equilibrium problems: (from Zumdahl textbook)

  • Write the balanced equation for the reaction.
  • Write the equilibrium expression using the law of mass action.
  • List the initial concentrations.
  • Calculate "Q," and determine the direction of the shift to equilibrium.
  • Define the change needed to reach equilibrium, and define the equilibrium concentrations by applying the change to the initial concentrations.
  • Substitute the equilibrium concentrations ionto the equilibrium expression, and solve for the unknown.
  • Check your calculated equilibrium concentrations by making sure they give the correct value of "K."

    Examples:

    1. Assume that the reaction for the formation of gaseous hydrogen iodide from hydrogen and iodine has an equilibrium constant of 2.3 x 102. In an experiment, 4.0 mol of each participant in the reaaction was added to a 2.0 L flask. Find the equilibrium concentrations of all species involved in this reaction.


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    Edited May 19, 2004 1:33 pm (diff)
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