ChemicalEquilibrium

ApchemWiki | RecentChanges | Preferences

Showing revision 12
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.

    The balanced equation for the reaction is: H2(g) + I2(g) <--> 2HI<sub>(g)


    ApchemWiki | RecentChanges | Preferences
    Edit revision 12 of this page | View other revisions | View current revision
    Edited May 19, 2004 1:35 pm (diff)
    Search: