Name: __________________________ EQUILIBRIUM CONSTANT WORKSHEET 1.

When 0.40 mol/L of PCl5(g) is heated to 200oC in a 2.00 L container, the followingequilibrium is established: PCl5(g)  PCl3(g) + Cl2(g) If 0.15 mol/L of chlorine gas is present at equilibrium, what is the Keq value for this system? Are reactants or products favored?

2.

Initially, the concentrations of nitrogen and oxygen gases are both 1.8 mol/L. If, at equilibrium, the concentration of nitrogen monoxide produced from the combination reaction is 1.8 mol/L, find the value of Keq.

3.

Find Keq for the system: 2CO(g) + O2(g)  2CO2(g) if initially there is 5.0 mol of CO, 10.0 mol of O2 and 1.0 mol of CO2 in a 2.0 L container and if at equilibrium there is CO2 at a concentration of 2.5 mol/L.

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Name: __________________________ 4.

In the following reaction system: N2O4(g)  2 NO2(g) 1.0 L of 0.678 mol/L of N2O4(g) is allowed to establish an equilibrium at 400C. If the percent reaction of N2O4(g) was found to be 26%, find Keq. Are the reactants or products favored?

5.

2.00 L of 1.32 mol/L dinitrogen pentaoxide gas was placed in a sealed vessel. Find the equilibrium concentration of the products, nitrogen dioxide and oxygen, if the percent reaction of dinitrogen pentaoxide was measured to be 65%.

6.

When 0.576 mol/L of both H2(g) and Cl2(g) were allowed to reach equilibrium at 450C, the equilibrium concentration of HCl(g) was found to be 0.356 mol/L. Find the equilibrium concentrations of the reactants.

7.

If Keq is 46 for the equilibrium established when hydrogen and iodine gases react to produce hydrogen iodide gas, and the equilibrium concentrations of both hydrogen and iodine is 0.10 mol/L, what is the equilibrium concentration of the products?

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