Name:___________________
CP Acids and Equilibrium Review
Date:________________
1. Using collision theory, explain how the following affect the rate of a reaction.
Surface Area
Concentration
Temperature
2. Using the information below, determine [H+] and [OH][H+]
I.
[OH-]
pH of 3.29
II.
pOH of 7.87
III.
pOH of 10.07
IV.
pH of 4.39
3. With the given the concentration, find the pH and pOH
I.
A solution with an H+ concentration of 0.0252 mol/L
pH:
pOH:
II.
A solution with an H+ concentration of 5.4x10-4 mol/L
pH:
pOH:
III.
A solution with an OH- concentration of 0.086 mol/L
pH:
pOH:
4. Describe what the term equilibrium means in a chemical reaction. Describe a real life
situation involving the concept of equilibrium.
5. Write the equilibrium expression for the following:
2H2(g) + O2(g) ⇄ 2H2O(g)
2NO(g) + Br2(g) ⇄ 2NOBr(g)
FeO(s) + CO(g) ⇄ Fe(s) + CO2(g)
2NO(g) + 2H2(g) ⇄ N2(g) + 2H2O(l)
2C2H6(g) + 7O2(g) ⇄ 4CO2(g) + 6H2O(g)
FeO(s) + CO(g) ⇄ Fe(s) + CO2(g)
6. Initial concentrations of H2(g) and Cl2 (g) in a flask were 0.576 mol/L The mixture was
allowed to reach equilibrium at 45°C. The equilibrium concentration of HCl(g) was
found to be 0.356 mol/L Calculate the equilibrium concentrations of the reactants
___H2(g) + __Cl2(g) ⇄ __HCl(g)
7. Initially 0.463 mol of HI(g) is placed in a 1.50 L reaction vessel. The temperature is
raised to 300°C and maintained until equilibrium is established. At equilibrium, the
vessel contains 0.119mol of hydrogen gas and 0.119 mol iodine gas. Calculate Keq for the
reaction. Are the products or reactants favored?
___HI(g) ⇄ __H2(g) + __I2(g)
8. What would happen to the position of the equilibrium if the following were to
occur?
A) Reaction: CH4 (g) + H2O (g) ↔ CO(g) + 3H2 (g) H = 206.5 KJ
Temperature is increased
CO is removed
CH4 is added
Volume is decreased
Pressure is decreased
H2 is added
B) CS2(g) +
4H2(g) ↔
CH4(g) +
2H2S(g)
∆ H= -21.3 kJ
Temperature is increased
CH4 is removed
Pressure is increased
Volume is decreased
H2 is added
H2S is added
9. What is the pH of a solution of 0.004M HNO3?
10. Find the pH of a 0.62 M solution of propanoic acid, HC3H4O2, ( Ka= 1.32x10-5)
11. It takes 38 mL of 0.75 M NaOH solution to completely neutralize 155 mL of a
sulfuric acid solution (H2SO4). What is the concentration of the H2SO4 solution?
12. 30.0 mL of 0.500 M hydrobromic acid is added to 38.0 mL of strontium
hydroxide of unknown concentration. What is the concentration off the base?
Use this space for any scratch work, notes, or equations used to help you solve acid
and/or equilibrium problems.