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CHEM 1211 and CHEM 1212 National ACS Exams
About the Exam Requirement
The Augusta University CHEM 1211 and 1212 Principles of Chemistry courses follow a common model
for course content and use national exams from the American Chemical Society (ACS). These exams
help validate course quality and ensure students are ready to succeed in subsequent coursework. In
fact, the catalog specifies meeting the standard on these exams as a prerequisite for the next course,
including transfer or transient courses.
What am I supposed to do?
CHEM 1211 or 1212 at Augusta University:
If you take these courses at AU, you must meet the departmental standard on the exam to earn a C or
better in the course. If you earned a C or better, there is no further action necessary and you meet the
prerequisite for the next course (CHEM 1211 CHEM 1212 or CHEM 1212 CHEM 3411)
CHEM1211 or 1212 level course at another institution
If you have taken the introductory chemistry course at another institution as a transfer or transient,
your course will transfer as CHEM A, and not automatically as CHEM 1211 or 1212. You have 3 possible
actions.
- No further chemistry courses planned : If you will not be taking additional chemistry courses, the
CHEM A will count as elective credit. If you need it to count in the Core Curriculum, bring the
course substitution approval form to the Department of Chemistry and Physics.
- Use ACS exam from other institution : If you plan to take the next chemistry course, and you
already took the ACS exam at your previous institution, you may ask your professor to send the
exam score, specifying test version, to the Department of Chemistry and Physics at Augusta
University. With a suitable score, the transfer will be updated from CHEM A to CHEM 1211 or
1212 as appropriate and you will meet the prerequisite for the next course.
- Take ACS exam here : If you didn’t take the ACS exam already, or are unable to have the score
sent, you may complete the exam here free of charge. You must contact the Department of
Chemistry and Physics (706‐ 737 ‐1541) to schedule a time during business hours 8 ‐ 5 M‐F. With a
suitable score, the transfer will be updated from CHEM A to CHEM 1211 or 1212 as appropriate
and you will meet the prerequisite for the next course.
How should I prepare for the exam?
The ACS publishes a study guide (ISBN 0 ‐ 9708042 ‐ 0 ‐2) that is available in the bookstore: Preparing for
Your ACS Examination in General Chemistry. It contains 10 chapters organized by topic that cover both
CHEM 1211 and CHEM 1212 material.
The CHEM 1211 course covers the following broad topics, and the exam is conceptual to determine
fundamental understanding of concepts.
Atomic Structure
Molecular Structure and Bonding
Stoichiometry
States of Matter and Intermolecular Forces
Periodicity
The CHEM 1212 course reinforces and builds upon the 1211 topics and further covers the additional
topics below. While the test requires understanding of topics, the test is less conceptual.
Solutions
Energetics
Dynamics
Equilibrium
Electrochemistry/Redox
As the published ACS Study Guide articulates, chemistry knowledge should be more than sets of
formulas and techniques. Rather, it is a coherent set of knowledge that enables comprehension of the
submicroscopic (chemical) world. As such, the ACS tests seek to uncover such genuine understanding.
CHEM 1211 Example Questions
There is an emphasis on conceptual questions. The actual exam will be multiple choice. The below
questions are guaranteed not to be on the exam.
Atomic Structure
- How many protons, neutrons and electrons are in each of the following?
56
Fe
39
K
Br
‐
α β
‐
- Match the quantum number (column 1) with what it represents (column 2).
There may be more than one answer in column two that is correct and column 2 answers may
be used more than once or not at all.
Column 1 Column 2
Principal (n) Number of nodes
Angular momentum (l) Shape of orbital
Magnetic (m l ) Size of orbital (distance orbital extends
from the nucleus)
Spin (m s ) Degenerate energies
Increasing potential energy
Direction electron is spinning
- Elemental iodine is a purple solid with naturally occurring iodine having the properties shown in the
table.
Property
Melting point 114 degrees C
Stoichiometry
All questions refer to the boxes above which represent a chemical reaction.
____________ 1. What is the chemical formula of the limiting reactant?
_____________ 2. What is the chemical formula of the product?
- The graph on the right describes what happens to the various components of the reaction over time.
Write the chemical formula of the component described by each line.
______________ A ______________B ______________ C
- Using phases and the simplest stoichiometric coefficients, write the chemical reaction.
States of Matter, including intermolecular forces
A B C
D E F
Refer to boxes A‐F for questions 1 ‐3.
- Classify each of the above boxes as appropriate:
heterogeneous homogeneous
mixture mixture compound element
- For the mixtures in the examples above, are they mixture of compounds, elements or compounds
and elements?
- Classify each of the above boxes as appropriate:
Solid Liquid Gas
- For each of the substances below
a. classify as polar covalent, nonpolar covalent, ionic or metallic
b. determine the strongest intermolecular force present in a pure sample of the substance
MnSO 4
CH
3
NH
2 K PCl 5 SCl 2
O
2 LiF
- Rank the substances in question 4 from highest melting point to lowest melting point.
- Circle one of the hydrogen bonds in the collection of molecules below.
c. Which of the two molecules has the stronger IMFs?
d. Which of the two molecules has the greatest surface tension?
e. If ethanol and dimethyl ether are held at the same temperature, will ethanol evaporate at the same
rate, slower or faster than dimethyl ether? Explain your answer.
For each substance below:
a) if it is ionic, write the formulas of the component ions
b) if it is covalent, draw the Lewis structure
CH
3
OCH
3
K
2
CO
3
CF
4 MnCl 3
_____________________2. Which of the substances above, if any, have hydrogen bonding?
_____________________3. Which of the substances above has the highest vapor pressure?
- In which of the following would dispersion forces be the only significant factors in
determining boiling point?
I. Ar II. Li2SO III. CF IV. Br V. NH
a) I, II, and III b) II, IV, and V c) I, III, and IV d) I, IV and V e) II and V
- Choose the substance with the highest boiling point.
a) CH b)
KI c) CS d)
HF e) I
- Which of the following compounds will be most soluble in pentane (C5H12)?
a) pentanol (CH3CH2CH2CH2CH2OH)
b) benzene (C6H6)
c) acetic acid (CH3CO2H)
e) ethyl methyl ketone (CH3CH2COCH3)
e) None of these compounds should be soluble in pentane.
- Place the following substances in order of increasing vapor pressure at a given temperature.
NF
NH
BCl
a) NH < NF < BCl b) NF < NH < BCl c) BCl < NF < NH
d) NH < BCl < NF e) BCl < NH < NF
- Consider the phase diagram above. If the dashed line at 1 atm of pressure is followed from 100 to
500 °C, what phase changes will occur (in order of increasing temperature)?
a) condensation, followed by vaporization
b) sublimation, followed by deposition
c) vaporization, followed by deposition
d) melting, followed by vaporization
e) No phase change will occur under the conditions specified.
- An aqueous solution of copper (II) chloride is made using 72.5 g of copper (II) chloride diluted to a total
solution volume of 1.50 L. Calculate the molarity, molality and mass percent of the solution (assume a
density of 1.05 g/mL for the solution).
- What is the van’t Hoff factor for a dilute aqueous solution of Ca(NO 3
2
a) 1 b) 2 c) 3 d) 4 e) 5
- Which of these aqueous solutions would be expected to have the highest boiling point?
a) 0.100 m CaCl b) 0.200 m NaOH c) 0.050 m K2SO
d) 0.050 m Al2(SO4) e) 0.200 m CH3OH
- Which aqueous solution would have the lowest vapor pressure at 25
o
C? (no calculation is required)
a) 1 m NaCl b) 1 m Na 3
PO
4 c) 1 m sucrose, C 12
H
10
O
11
d) 1 m MgCl 2 e) 1 m glucose, C 6
H
12
O
6
- Classify the following as electrolytes or non‐electrolytes.
a) CH 3
OH ______________________________
b) AgC 2
H
2
O
2
______________________________
- Under what conditions would the following reactions be spontaneous?
a) A (g) + 2 B (g) C (g) ΔH = ‐ 50 kJ/mol
b) A
(aq) + X
‐
(aq) AX (s) ΔH = 25 kJ/mol
c) A (l) A (g) ΔH = 50 kJ/mol
- Place the following in order of decreasing molar entropy at 298 K.
HCl N2H Ar
a) Ar > N2H
HCl b) Ar > HCl > N2H c)
N2H
Ar > HCl
d) N2H
HCl > Ar e) HCl > N2H Ar
- Calculate ΔS°rxn for the following reaction. The S° for each species is shown below the reaction.
C2H2(g) + H2(g) → C2H4(g)
S°(J/mol
K) 200.9 130.7 219.
A) +112.3 J/K B) +550.9 J/K C) ‐112.3 J/K D) +337.1 J/K E) ‐550.9 J/K
- Estimate ΔG°rxn for the following reaction at 387 K.
HCN(g) + 2 H2(g) → CH3NH2(g) ΔH°= ‐158.0 kJ; ΔS°= ‐219.9 J/K
A) +243 kJ B) ‐72.9 kJ C) +84.9 kJ D) ‐92.5 kJ E) ‐ 188 kJ
- Use Hess's law to calculate ΔG°rxn using the following information.
CO(g) → C(s) + 1/2 O2(g) ΔG°rxn =?
CO2(g) → C(s) + O2(g) ΔG°rxn = +394.4 kJ
CO(g) + 1/2 O2(g) → CO2(g) ΔG°rxn = ‐257.2 kJ
A) ‐60.0 kJ B) +651.6 kJ C) ‐265.8 kJ D) +137.2 kJ E) +523.0 kJ
Dynamics
- Given the following balanced equation, determine the rate of reaction with respect to [NOCl]. If the
rate of Cl loss is 4.84 × 10
M/s, what is the rate of formation of NOCl?
2 NO(g) + Cl2(g) → 2 NOCl(g)
a) 4.84 × 10
M/s b) 2.42 × 10
M/s c) 1.45 × 10
M/s d) 9.68 × 10
M/s
e) 1.61 × 10
M/s
- The following kinetic data were obtained for the reaction
NO
2 (g)
+ O
3 (g)
NO
3 (g)
+ O
2 (g)
Experiment [NO 2
], M [O
3 ], M initial rate (M/s)
1 0.21 x 10
‐ 3
0.70 x 10
‐ 3
6.3 x 10
‐ 3
2 0.21 x 10
‐ 3
1.39 x 10
‐ 3
12.5 x 10
‐ 3
3 0.38 x 10
‐ 3
0.70 x 10
‐ 3
11.4 x 10
‐ 3
4 0.66 x 10
‐ 3
0.18 x 10
‐ 3
?
a. Write the rate law for this reaction (show your work).
b. What is the order of the reaction (overall)?
c. Determine the value of the rate constant (with the correct units).
d. Predict the rate of the reaction in experiment 4 based on the determined rate law.
- The first‐order decomposition of N2O at 1000 K has a rate constant of 0.76 s
If the initial
concentration of N2O is 10.9 M, what is the concentration of N2O after 9.6 s?
- Using the following elementary steps, answer the questions below.
k 1
A + B ⇌ C + D fast, equilibrium
k ‐ 1
k 2
C + E F slow
a) What is the overall or bulk reaction?
b) List any intermediates in the reaction mechanism (if any).
c) List any catalysts in the reaction mechanism (if any).
d) Write the rate law for the reaction (remember the rate law cannot contain reaction intermediates).
b. Will the reaction mixtures in the other two scenes proceed toward reactant or toward products to
reach equilibrium?
c. For the mixture at equilibrium, how will a rise in temperature affect [Y 2 ] and K?
d. How will a decrease in pressure influence the mixture at equilibrium?
- Consider the following reaction at equilibrium. What effect will adding more H2S have on the
system? 2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g)
a) reaction shifts left b) No change c) The equilibrium constant will decrease.
d) The equilibrium constant will increase. e) reaction shifts right
- Consider the following reaction at equilibrium. What effect will increasing the volume of the reaction
mixture have on the system?
2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g)
a) increases [SO 2 ] b) No effect c) decreases [SO 2
]
d) The equilibrium constant will decrease. e) The equilibrium constant will increase.
- For the reactions below, calculate the equilibrium constant using the information given.
A. CaCO 3 (s) CaO (s) + CO 2
(g) ; ΔG = +131.4 kJ/mol
B. N
2 (g) + 3 H 2 (g) 2 NH 3
(g) ;ΔG = ‐53.0 kJ/mol
C. CH
4
(g) + 2 O 2
(g) CO 2
(g) + 2 H 2
O (g) ; ΔH = ‐802.5 kJ/mol, ΔS = ‐5.3 J/mol∙K
- Which of the following is not true for ΔGrxn?
a) If ΔG°rxn
0, the reaction is spontaneous in the forward direction.
b) If Q = 1, then ΔGrxn = ΔG°rxn.
c) If ΔG°rxn = 0, the reaction is spontaneous in the reverse direction.
d) If ΔG°rxn
0, the reaction is spontaneous in the reverse direction.
e) Under equilibrium conditions, ΔGrxn = 0.
- Calculate the pH of 0.10 M solutions of the following substances.
a. NaOH
b. NH 3
c. HC 2
H
3
O
2
d. Ba(OH) 2
e. LiF
- Which of the following solutions is a good buffer system?
A) A solution that is 0.10 M NaCl and 0.10 M HCl
B) A solution that is 0.10 M HCN and 0.10 M LiCN
C) A solution that is 0.10 M NaOH and 0.10 M HNO
D) A solution that is 0.10 M HNO and 0.10 M KNO
E) A solution that is 0.10 M HCN and 0.10 M NaCl
Electrochemistry/REDOX
- Balance the following redox reactions using the half‐reaction method and determine the number of
electrons transferred in each reaction. Also identify the oxidation and reduction half‐reactions.
a) Pb (s) + Cl 2 (g) PbCl 2 (s)
b) K (s) + Al
3+
(aq) K
(aq) + Al(s)
c) Ag|Ag
||Cr
3+
|Cr
- Consider the voltaic cell below and answer the questions that follow:
a) What is the overall reaction?
b) What is the anode? The cathode?
c) What species is oxidized? reduced?
d) What should the voltmeter read?
e) What is the ΔG° for the reaction if all species in aqueous
solution are at a concentration of 1.0 M?
f) Write the shorthand notation for the standard cell.
g) What is the ∆G for the reaction if the concentration of Ag
is
0.25 M and the concentration of Ni
2+
is 0.75 M?
