UHScienceResource.squarespace.com
Simulated Exam II (SSF16Gc2E2F)
UHScienceResource.squarespace.com
1
UHScienceResource.squarespace.com
Disclaimer: UHScienceResource provides resources and services but is not responsible for, and expressly disclaims all
liability for, damages of any kind arising out of use, reference to, or reliance on any information provided. While the
information contained within the site is periodically updated, no guarantee is given that the information provided is
correct, complete, and up-to-date. Moreover, UHScienceResource is not responsible for the accuracy or content of
information contained in external sites provided by links.
Notice to User: Great effort has been used to make this document accurate and comprehensive but may still contain
typos or other errors. If any errors are found, please email them to:
[email protected]
UHScienceResource.squarespace.com
2
UHScienceResource.squarespace.com
1. The reaction below is endothermic. if pressure is increased
N2O4(g)  2NO2(g)
A.
B.
C.
D.
E.
Goes toward the left toward reacants
Goes to the left toward products
Goes to the right toward reacants
Goes to the right toward products
None of the above
2. Which is the strongest acid?
A.
B.
C.
D.
E.
Species
NH3
CH3NH2
H2NNH2
C6H5NH2
C5H5N2
Kb
1.8 x 10-5
4.4 x 10-4
3.0 x 10—6
3.8 x 10-10
1.7 x 10-9
3. If a 100 mL, 0.5 M solution of CH3NH2 (Kb = 4.4 x 10-4) is mixed with a 50 ml 0.5 M HCl solution, what is the
pH?
A.
B.
C.
D.
E.
1.46
10.64
4.38
6.14
None of the above
4. Ammonium chloride solid decomposes after heating in the reaction below. What is K p at the temperature
for the given reaction if the total pressure is 6.6 atm?
NH4Cl(s)  NH3(g) + HCl(g)
A.
B.
C.
D.
E.
11.6
4.38
10.9
8.39
10.2
5. Kw = 2.92 x 10-14 at 40⁰ C. Find the H3O+ and OH- and pH of water.
UHScienceResource.squarespace.com
3
UHScienceResource.squarespace.com
6. For the reaction given below at 600⁰ C, Kp = 1.16. A 100 g of CaCO3 (100 g/mol) in a 10 L container is heated
to 600⁰ C. What is the mass in grams of CaCO3 reacted to get to equilibrium?
CaCO3(s)  CaO(s) + CO2(g)
A.
B.
C.
D.
E.
21.4 g
16.2 g
8.21 g
7.26 g
None of the above
7. A 100 mL, 0.5 M solution of phenol (Ka = 1.05 x 10-10) is mixed with 100 mL, 0.5 M NaOH solution. What is
the pH?
A.
B.
C.
D.
E.
1
Greater than 7
Less than 7
Equal to 7
None of the above
8. You have a weak acid solution (0.063 M, pH = 3.95). Find its Ka
9. The equilibrium constants below are at 427⁰ C. What is the equilibrium constant for the reaction given
below.
2NaO(g)  Na2O2(s)
Na2O(s)  2Na(l) + ½ O2(g)
NaO(g)  Na(l) + ½ O2(g)
Na2O2(s)  2Na(l) + O2(g)
Na2O2(s)  Na(l) + O2(g)
K = 2 x 10-25
K = 2 x 10-5
K = 5 x 10-29
K = 3 x 10-14
10. Rank 0.1 M solutions given below in order of most to least acidic
KOH, HCl, KNO3, KCN, NH4Cl
UHScienceResource.squarespace.com
4
UHScienceResource.squarespace.com
11. For a 1 M HF and 0.4 M KF solution mixture (Ka = 7.24 x 10-4), what is the pH?
12. N2(g) + O2 (g)  2NO(g) (Kp = 1 x 10-27 at 25⁰ C). Find the concentration of NO in molecules/cm3 in the air
when equilibrium is reached at 25⁰ C (PN2 = 0.8 atm, PO2 = 0.2 atm, at 1 atm there’s ~ 2.46 x 1019 molecules)
13. A basic sodium acetate aqueous solution gives what net ionic equation?
14. For N2(g) + 3H2(g)  2NH3(g) Kp is given for the various temperatures shown below. Select the true
statement.
Kp = 4.34 x 10-3 at 300⁰ C
Kp = 1.56 x 10-5 at 500⁰ C
Kp = 2.25 x 10-6 at 600⁰ C
A. Reaction shifts toward the reactants as T increases and reaction is exothermic in the forward direction
B. Reaction shift toward products as T increases and reaction is endothermic in the forward direction
C. Reaction shifts toward the reactants as T increases and reaction is endothermic in the forward
direction
D. None of the above
15. The figures below show the titration of HOCl (Ka = 1.1 x 10-9) with varying amounts of KOH. Rank the
following in order of increasing pH.
UHScienceResource.squarespace.com
5
UHScienceResource.squarespace.com
16. What is the pH for a 0.02M solution of HIO3 (Ka = 0.17) 1.74
17. 1.2 mol of Cl2, 7.5 x 10-3 mol of NO, 1.0 mol of NOCl are in a container that is 3.0 L. What is the K c for the
reaction given below
2NOCl(g)  2NO(g) + Cl2(g)
18. What is the Ba(OH)2 (aq) concentration if pH = 11.5?
19. A solution contains 100 mL of 0.06 M HCl and 100 mL of 0.1 M NaF (HF Ka = 7.24 x 10 -4). Find the pH.
20. A container that is 1 L in volume has 0.01 atm NO, 2.0 atm O2 and 0.11 atm N2. True or False, this reaction is at
equilibrium.
2NO(g)  N2(g) + O2(g) (Keq = 2.2 x 103)
UHScienceResource.squarespace.com
6