Equilibrium Expressions - Kp, Ka, Kb, Ksp, and Keq

Problem Set IconUsing your knowledge of equilibrium expressions and constants, complete each problem. Follow the instructions provided and answer all of the questions. Make sure to show all of your work.

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StudentDetermine the chemical equilibrium expression for the following reactions:

  1. 2NO2 (g) ⇄ N2O4
  2. 2SO3 (g) ⇄ 2SO2 (g) + O2 (g)
  3. N2 (g) + 3H2 (g) ⇄ 2NH3 (g)
  4. 4HCl (g) + O2 (g) ⇄ 2Cl2 (g) + 2H2O (g)


Determine the chemical equilibrium constant for the following problems:

  1. At an extremely high temperature and at equilibrium, a mixture is found to have 1.83 x 10-3 M hydrogen gas, 3.13 x 10-3 M iodine vapor and 1.77 x 10-2 M hydrogen iodide gas. Calculate the equilibrium constant using the following reaction:

H2 (g) + I2 (g) ⇄ 2HI (g)

  1. A mixture has 0.400 M of SO3, 0.480 M of H2O, and 0.600 M of H2SO4. Calculate the equilibrium constant using the following reaction:

SO3 (g) + H2O (g) ⇄ H2SO4 (l)

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