UNIT 13 PROBLEM SET III NAME______
DIRECTIONS: There is NOT ENOUGH ROOM ON THIS PAGE to do any work. All your work must be completed neatly on another sheet for any credit!!!
1. Determine the equilibrium constant for the following reaction if the concentration
of [N2O4] = 1.50 x 10-3 M and [NO2] = .571 M. USE THE FOLLOWING REACTION:
(obj.14a)
N2O4(g) <====> 2 NO2(g)
2. For the reaction: 2 SO2(g) + O2(g) <====> 2 SO3(g), the concentration of the sulfur oxides are
[SO2] = 2.00 M and [SO3] = 10.0 . What is the concentration of the oxygen when the K = 800.0 for the reaction? (obj.14b)
3. Determine the equilibrium concentration when 1.00 mole of I2(g) and 1.00 mole of H2(g) are put into a 5.00 l container. At the reaction temperature, the K = 64.0. Use the following reaction:
(obj.14e)
H2(g) + I2(g) <====> 2 HI(g)
4. At a specific temperature, .0750 mole of each reactant ( CO and H2O ) is added to a one liter container. At equilibrium the [CO] = .0210. What is the value of K for the reaction:
(obj.14d)
CO(g) + H2O(g) <====> CO2(g) + H2(g)
5. Using the last line in the box from problem #4 as the first line in box 5, determine the new equilibrium concentrations if an additional .0050 moles/liter of each reactant are added to the container.
(obj.14d)
6. At a specific temperature the equilibrium constant for the reaction given is 43.8. If 2.00 moles I2(g) and 1.00 moles H2(g) are put into a container measuring exactly five liters, unlimited sig. figs., what are the equilibrium concentrations of all the species?
(obj.14e)
H2(g) + I2(g) <====> 2 HI(g)
7. For problem #6 what happens to the concentrations if the volume is expanded to exactly ten liters, again unlimited sig. figs. ?
(obj.14e)
8. Considering the equation in problem #6, the K = 45.9 at a different temperature. If 1.000 moles of each reactant is added to a container which measures 1.000 l, what is the final concentration when equilibrium has been reached?
(obj.14e)
9. The K = .0420 for the equilibrium reaction: PCl5(g) <===> PCl3(g) + Cl2(g).
Determine the equilibrium concentrations of all species if the initial concentration of PCl5(g) = .0500 M.
10. A student prepares a solution by combining .025 moles CaCl2 and .015 moles Pb(NO3)2
and adding water to makes a 1.00 l solution. Will a precipitate of PbCl2(s) form in this solution?
(obj.17)