Name___________________________________ Pd______
Ch 17 Equilibrium Review
1. Given the chemical reaction N2(g) + 3H2(g)  2NH3(g), what will happen to the equilibrium constant (Keq ) for this
reaction if the concentration of H2 is increased?
2. What could you do to change the equilibrium constant for a reaction?
3. Given the chemical reaction N2(g) + 3H2(g)  2NH3(g), which is exothermic, what could you do (list all) if you wanted
the system to produce more ammonia?
4. Given the reaction A + BC + 55kJ  AB + C, what direction would the reaction shift if the temperature of the system
were decreased?
5. How is the dissolving of an ionic or polar substance in water an example of equilibrium?
6. What is Ksp? If substance A has a lower Ksp than substance B, which is more soluble?
7. Calculate the Ksp value for BaSO4 if it has a solubility of 3.9 x 10-5M at 25 degrees celcius.
8. The Ksp for CoCO3 is 1.5 x 10-13. Calculate the solubility of CoCO3 in moles per liter.
9. If the Ksp for CaCl2 were 5.0 x 10-2 what would be the concentration of the chloride ions?
10. __________________ A chemical equation is given: 2A2 + B2  2A2B + energy. The reaction runs until equilibrium is
reached, but then later the temperature of the system is increased. Which of which of the 3 substances (A 2, B2, A2B) will there be
more of after the temperature is increased? (choose all that apply.)
11. ________ Salt is dissolved in water so that a saturated solution is created. Which of the following is true?
a. All of the salt is dissolved.
b. Salt is going from solid to aqueous and aqueous to solid in equal amounts.
c. More salt is going from solid to aqueous than aqueous to solid.
d. More salt is going from aqueous to solid than solid to aqueous.
12. ________ At equilibrium the amount (mass) of the products is
a. greater than the reactants
c. less than the reactants
b. equal to the reactants
d. It depends—it could be any of the above.
13. _________A chemical equation is given: 2AB + B2  2AB2. The reaction runs until equilibrium is reached, but then later the
more AB is added. The amount of B2 _______________ and the amount of AB2 _______________.
a. Increases, increases
b. Increases, decreases c. Decreases, increases
d. Decreases, decreases