CHEMISTRY 112A, SUMMER 2016
LECTURES: MTWRF 9:00A – 10:45A Lab Sciences 301, 3.0 Units
OFFICE HOURS: MTWRF 11:00A – 12:00 (noon), Lab Sciences 101
INSTRUCTOR: Ken Chanthamontri, Ph.D.; E-mail: [email protected]
TEACHING ASSISTANT: Rishi Jaswaney; Email: [email protected]
TEXTBOOK: D. Oxtoby, H. Gillis, and A. Campion, Principles of Modern Chemistry (8th
edition) and any textbooks at library, online sources, etc.
COURSE DESCRIPTIONS: Continuation of Chem 111A that covers chemical equilibria, ionic
equilibria, galvanic cells, chemical potential, and the Laws of Thermodynamics
COURSE WEB SITE: The Chem 112A Web site contains general information, announcements,
reading assignments, solutions to assigned problems, quizzes, and exam problems. The Web site
is found on the Blackboard Web site (https://bb.wustl.edu)
CALCULATORS: For Chemistry 111A and 112A offered in the 2015-2016 academic year, only the
following models of electronic calculator will be allowed during quizzes and exams:
The preferred models for ease of calculation are the following 4-line calculators:
• TI-30 XS Multiview • TI-34 Multiview
The following 2-line calculators are also acceptable:
• TI-30Xa
• TI-30X IIs (solar)
• TI-36X
PLEASE NOTE: The TI-30XS-PRO and the TI-36X-PRO are NOT allowed.
No exceptions will be granted and this policy will be strictly enforced. These are all four- or two-line,
non- programmable, non-graphing calculators. They are available from the WU bookstore, and also
from (among other places) Amazon, Walgreens, Comp USA, Staples, and Office Depot. Please note:
your calculator must be approved by your TA during the office hours before you take EXAM 1
on July 22, 2016
PROBLEM SETS: Problem sets (PSs) will usually be assigned 2 times/week (every Wednesday
and Friday). Wednesday’s PSs have to be turned in at the beginning of a class on the following
Friday and Friday’s PSs have to be turned in at the beginning of a class on the following
Wednesday. Late PSs will NOT be graded. All assigned problems, either from the textbook or
additional non-textbook problems, will be posted under the Problem Set Assignment Folder.
GRADING:
3 exams
Comprehensive Final
Problem sets
20% each (Total 60%)
20%
20%
There are no make-up exams. Cheating of any form will result in a score of zero for the
exam.
When asking for consideration in re-grading, if any marks, changes or erasures are made
to an exam after it has been returned, a grade of zero will be given on the exam and may not be
dropped. Any requests for re-grading must be made within one week of the date that the exam
was returned.
Please note: absolutely no regrade requests will be considered after passing a week of the
date that the exam was returned.
TEST DATES: 7/22 (F), 7/29 (F), 8/12 (F), Final Exam, August 18th (F) All are one-and-a-half
hour (1.5 hr) exams
The final exam is mandatory for obtaining a passing grade in the course.
GRADING SCALE:
93.0 – 100%
90.0 – 92.9%
87.0 – 89.9%
83.0 – 86.9%
80.0 – 82.9%
77.0 – 79.9%
A
AB+
B
BC+
73.0 – 76.9%
70.0 – 72.9%
67.0 – 69.9%
63.0 – 66.9%
60.0 – 62.9%
59.9 % and lower
C
CD+
D
DF
Letter grads will be assigned on the basis of a direct comparison of the point totals to the
sum of the grad cutoffs. The instructor reserves the right to adjust the letter-grade cutoffs to lower
total percentage values, but cutoff-percentage values will not be raised. For students opting to take
the course Credit/No Credit, a Credit will require a letter-grade equivalent of a C- or above.
CLASS ATTENDANCE: The summer course is different than a regular semester course. That
means we are covering 2-3 weeks of regular semester material in a week. The benefit, however, is
that you are focused on this one course. You can learn a lot in short time if you stay focused! No
points are awarded for attendance this summer. You have to decide if attendance is worth it to you!
DISABILITY SERVICES: Students who are seeking disability information or support for a
disability should contact Disability Resources (DRC) at 935-5970. Disability Resources is located
at Cornerstone in Gregg Hall on the South 40. Disability Resources is responsible for approving
and arranging all accommodations for University students.
ETHICS: Evidence of an academic integrity violation or attempted academic integrity violation
will be forwarded to the Committee for Student Academic Integrity, and we will follow the
committee’s recommendations. Please refer to the Statement of Student Academic Integrity" on
the Washington University Web site at: http://studentconduct.wustl.edu/academic-integrity/
policies-and-procedures/
Please note: all graded quizzes and exams are scanned and filed prior to returning to students.
ACCOMMODATIONS BASED UPON SEXUAL ASSAULT: The University is committed to
offering reasonable academic accommodations to students who are victims of sexual assault.
Students are eligible for accommodation regardless of whether they seek criminal or disciplinary
action. Depending on the specific nature of the allegation, such measures may include but are not
limited to: implementation of a no-contact order, course/classroom assignment changes, and other
academic support services and accommodations. If you need to request such accommodations,
please direct your request to Kim Webb ([email protected]), Director of the Relationship and
Sexual Violence Prevention Center. Ms. Webb is a confidential resource; however, requests for
accommodations will be shared with the appropriate University administration and faculty. The
University will maintain as confidential any accommodations or protective measures provided to
an individual student so long as it does not impair the ability to provide such measures.
If a student comes to one of the General Chemistry instructors to discuss or disclose an instance
of sexual assault, sex discrimination, sexual harassment, dating violence, domestic violence or
stalking, or if we otherwise observe or become aware of such an allegation, we will keep the
information as private as we can, but as faculty members of Washington University, we are
required to immediately report it to our Department Chair or Dean or directly to Ms. Jessica
Kennedy, the University’s Title IX Coordinator. If you would like to speak with the Title IX
Coordinator directly, Ms. Kennedy can be reached at (314) 935-3118, [email protected], or
by visiting her office in the Women’s Building. Additionally, you can report incidents or
complaints to Tamara King, Associate Dean for Students and Director of Student Conduct, or by
contacting WUPD at (314) 935-5555 or your local law enforcement agency.
You can also speak confidentially and learn more about available resources at the Relationship
and Sexual Violence Prevention Center by calling (314) 935-8761 or visiting the 4th floor of
Seigle Hall.
Bias Reporting: The University has a process through which students, faculty, staff and
community members who have experienced or witnessed incidents of bias, prejudice or
discrimination against a student can report their experiences to the University’s Bias Report and
Support System (BRSS) team. See: brss.wustl.edu
Mental Health: Mental Health Services’ professional staff members work with students to
resolve personal and interpersonal difficulties, many of which can affect the academic experience.
These include conflicts with or worry about friends or family, concerns about eating or drinking
patterns, and feelings of anxiety and depression. See: shs.wustl.edu/MentalHealth
DISCLAIMER: The instructors reserve the right to make modifications to this information
throughout the semester.
Chem 112A
Course Outline
Summer, 2016
Chemical Equilibria (Chapter 14, excepting 14.3 and 14.7): Nature of chemical equilibrium; the
Law of Mass Action; equilibrium constants; predicting the direction of reactions; equilibrium
calculations; Le Chatelier's principle.
Acid-Base Equilibria (Chapter 15): Classification and properties of acids and bases; strong and
weak acids and bases; the autoionization of water; the pH scale; the pH of weak acids and bases;
buffers; titrations and indicators; polyprotic acids.
Solubility Equilibria (Chapter 16): Solubility products; common ion effect; precipitation and
selective precipitation.
Thermodynamics, Part 1: (Chapter 12): Heat, work and energy; the first law; systems, state
functions, path functions, cycles and processes; calorimetry; enthalpy; heat capacity; enthalpies of
physical and chemical changes.
Thermodynamics, Part 2: (Chapters 14 and Sections 14.3, 14.7): Nature of spontaneous
processes; entropy and spontaneity (the second law); the microscopic interpretation of entropy;
entropy changes in physical and chemical processes; the third law; standard molar entropies; Gibbs
free energy; the thermodynamic description of equilibrium; temperature dependence of
equilibrium constants.
Electrochemistry (Chapter 17): Galvanic cells; Gibbs free energy and cell voltage; concentration
effects and the Nernst equation; pH meters; batteries; fuel cells; corrosion; electrolysis.
Chemical Kinetics (Chapter 18): Rates of chemical reactions; rate laws; reaction mechanisms; the
effect of temperature on reaction rates; collision theory; catalysis and catalysts.
Physical Equilibria (Chapters 10, 11): Vapor pressure of pure liquids; the variation of vapor
pressure with temperature; freezing and melting; phase diagrams; solutions and solubility;
colligative properties; binary liquid mixtures.
Monday
Tuesday
Wednesday
Thursday
Friday
7/18
-General Information
7/19
-Rates of Reactions
-Law of Mass Action
-Activities
-ICE Tables
-Predicting the Direction of a
Reaction: Q vs K
-Method of Successive
Approximations
-“Pushing” a Reaction
-Le Chatelier’s Principle
-Heterogeneous Equilibria
7/20
PS1
7/21
-pH and % Dissociation of a Weak
Acid in Water
-pH of a Weak Base in Water
-Buffers
-Addition of Strong Acid or base to
a Buffer
-Designing a Buffer
-Henderson-Hasselbalch Equation
-Basic Buffers
7/22
Exam 1
PS1-turn in
PS2
7/26
-Selective Precipitation
-Silver Chromate Demo
7/27
PS2-turn in
PS3
-Enthalpy (continued)
-Comparison of U and H for a
Combustion Reaction
-Heat Capacity
-Molar Heat Capacities for Ideal and
Real Gases
- Thermodynamic Parameters for a
Heated Gas
-Thermochemistry
-Hess’s Law
-Standard Enthalpy of Reaction (Horx)
-Standard Enthalpy of Formation (Hof)
- Standard Enthalpy of Formation
(Hof)
-Standard Enthalpy of Reaction (Horx)
from Hof’s
7/28
-Kirchoff’s Law
-Molar Bond Enthalpy (HoB)
- Molar Bond Enthalpy (HoB)
-Estimation of Reaction Horx from
HoB’s
-Molar Atomization Enthalpy
(HoA)
-Estimation of Hof from HoA’s
and HoB’s
-Enthalpy of Phase Changes,
Heating Curves
-Heating Curve for Water
-Second Law of Thermodynamics
-Microstates, Probability, and
Entropy
-Boltzmann’s Equation
7/29
Exam 2
PS3-turn in
PS4
Chemical Equilibria (Ch. 14)
-Introduction to Chemical
Equilibrium
-Fundamental Features of
Equilibrium
7/25
- Titration of a Strong Acid /Strong
Base, Weak Acid/Strong Base
-Indicators
-Red Cabbage Demo
-Titration of a Weak Acid with a
Strong Base
-pH of Polyprotic Acids
-pH of Amphiprotic Salts
Solubility Equilibria (Ch. 16)
-Ksp, the Solubility Product Constant
-Solubility of Salts
-Common Ion Effect
-Corollary to the Common Ion Effect
Thermodynamics (Ch. 12)
-Heat and Work
-First Law of Thermodynamics
-Thermodynamic Systems
-Internal Energy (U)
-PV (Expansion) Work
-State and Path Functions
-Bomb Calorimetry
-Enthalpy
Acid-Base Equilibria (Ch. 15)
-Definitions of Acids and Bases
-Strong and Weak Acids
-The Weak Acid Ionization Constant, Ka
-Strong and Weak Bases
-Conjugate See-Saw
-Solvent Leveling
-Table of Conjugate Acid-Base Pairs
-Autoionization of Water
-pH Scale
-Relationship of Ka and Kb
8/1
8/2
8/3
PS4-turn in
Ken goes to a conference in Denver, CO
8/8
Electrochemistry (Ch. 17)
-Intro to Electrochemistry
-Galvanic Cells
-Concentration Cells
-Daniell Cell
-Relationship between welec, E,
and G
-Standard Reduction Half-cell
Potentials, E0red’s
-Designing a Galvanic Cell
-Rules for Adding and Subtracting
E0’s
-Nernst Equation
-Relationship between E0 and K
-Calculating Ksp from
Electrochemical Data
8/9
-Primary Cells (Acid and Alkaline)
-Secondary (Rechargeable) Cells
-Fuel Cells
-Corrosion
-Sacrificial Metals/Cathodic
Protection
-Oxidizing and Reducing Agents
-Electrolytic Cells
-Electrolysis of Water
8/10
PS5-turn in
PS6
Chemical Kinetics (Ch. 18)
-Rates of Chemical Reactions
-Reaction Order
-1st and 2nd Order Rate Laws
-Half-Life
-General Rate Law
-Initial Rate Method
-Proposed Mechanisms
-Elementary Reaction Steps,
Molecularity, Order
-Rate-Determining Steps
-Pre-Equilibrium Steps
8/4
Thermodynamics (Ch. 13)
-S for an Expanding Gas
-S for a heated gas
-S for phase changes
-Standard molar entropy (S0)
-Calculating S0rx from S0 values
-Third Law of Thermodynamics
-Calculating S0rx from S0 values
-Suniv and Spontaneity
-Suniv for Cooling of a Hot Body
-Suniv for Isothermal Expansion of
a Gas
-Gibbs Free Energy, G
-Gsys and Spontaneity
-Standard Free Energy of
Formation, G0f
8/11
-Steady-State Approximation
-Potential Energy vs. Reaction
Coordinate Plots
-Potential Energy vs. Reaction
Coordinate Plots
-Activation Energy, Ea
-Factors that Contribute to Reaction
Rate
-Arrhenius Equation
-Ways to Increase the Rate Constant
-Effect of T on k1 and k‒1
-Catalysis
-Effect of Ea on k1 and k‒1
8/5
PS5
- Calculating G0rx from
G0f’s
-Calculating G0rx from
H0f’s and S0’s
-The Chem 112 Arch
-Dependence of Free Energy
on Pressure
-Non-Standard State Free
Energy, G
Sect. 14.3 & 14.7
-Relationship between G, K
and Q (The “Keystone Piece”)
-Temperature Dependence
of K
-Van’t Hoff Equation
-Plot of Total Free Energy vs.
Reaction Coordinate
8/12
Exam 3
PS6-turn in
PS7
Course Timeline/Schedule
8/15
-Measuring Equilibrium Vapor
Pressure
-Calculating Equilibrium Vapor
Pressure
-Normal Boiling Point
-Clausius-Clapeyron Equation
-Phase Diagrams
-Phase Diagram for H2O
-Phase Diagram for CO2
-Phase Rule
-Phase Diagram for Carbon
8/16
Sect. 11.5 & 11.6
-Raoult’s Law
-Positive and Negative Deviations
from Raoult’s Law
-Temperature/Composition Diagrams
for Mixtures of Liquids
-Temperature/Composition Diagrams
for Ideal Mixtures of Liquids
-Phase Rule Revisited
-Fractional Distillation
-Azeotropes
-Temperature/Composition Diagrams
Involving Azeotropes
-Henry’s Law
-Colligative Properties
-Vapor Pressure Lowering
8/17
PS7-turn in
-Vapor Pressure Lowering
-Boiling Point Elevation
-Freezing Point Depression
-Osmotic Pressure
8/18
Final Exam
DISCLAIMER: The instructors reserve the right to make modifications to this schedules throughout the semester.