Chemistry 211, Fall 2009, All four sections
Dr. Petr Vanýsek, Instructor
Q: When do I see the results of my test?
A: I will strive to have the graded tests back to you the
following lecture. If I anticipate delay, I will let you know the day of the test. If you
do not pick up your graded test during the lecture, then you can get it during the regular
office hours, Monday, Wednesday and Friday, 9:00-9:50. I will ask you why you missed
the class, so have a story ready to amuse me.
The answers for the test will be posted here, shortly after the test was taken.
Test I The key is for version A, however,
version B is very similar.
Test II version A
version B
Test III version A
Test IV version A version B
Final - The grades were
submitted officially to the Registrar at 18:30 Dec. 7. I hope you like your course grades.
Apparently, they are already posted (not the finals' grades) at MyNIU as of Monday
evening. Have a nice break.
The following is recommended
study material for the upcoming tests
(I am not posting answers to these problems. Most of the problems are similar to others,
in the book, for which you will find the answers there.) Recommended does not mean that
learning to answer only these problems will cover everthing you need for the test.
NOTE: There will not be assigned seating. The room is full, with perhaps 4 seats left total. When you come in, sit towards middle, do not leave any empty seats. I will provide a periodic table with each test. You do not have to be concerned whether you can see well the one up front.
Test I, 2009 (18 Sept. 2009, 15 questions, 100 points total) (first problems posted 30 August 2009)
Some problems will be calculations, numberical answers will be required. Bring a calculator. Some problems will be word answers. It is not desirable to write long descriptions. Be terse, specific, but still use full sentences and proper grammar. Remember, spelling counts as well.
1. (Practice problem.) How much energy is needed to convert 50 g piece of ice at temperature - 13 oC to steam at temperature 127 oC? [The relevant constants will be provided in the test, the equations will not.]
2. What is the Clausius-Clapeyron equation, where, why and how would you use it?
3. Know how is the the crystal structure of a real crystal determined. Know what are the units cells, their characteristics, what is the efficiency of various examples of close packing.
4. Colligative properties
5. Viscosity, surface tension and unusual prperties of water.
6. Know the meaning and use of phase diagrams.
7. Know how to deal with concentration calculations (this problem will be numerical)
8. Know the general propertises of elements, as covered in chapter 14.
Test 2, (16 Sept. 2009, 15
questions, 100 points total)
September 16 is the last day to withdraw from the course.
Chapters 15 and 16
Know the rules for naming organic compounds
Know how to draw structures when a name is given and how to name a compound when a structure is given.
Know the functional groups of organic compounds.
Know the variability of structures when empirical formula is given and be prepared to sketch all possibilities.
Know the types of organic reactions presented in class.
Know what is chirality.
Know basic ideas of making polymers.
Know what factors determine the rate of chemical reaction.
Know the purpose of Arrhenius relationship.
Know how to calculate empirical formula of an organic compound when it is burned and the mass of the combustion product is given.
Know how to find order of reaction, rate constant and how to write the rate law from given experimental data.
Test 3, 4 November (15 probelms, 100 points)
Know the difference between homogeneous and heterogeneous.
Know the difference between the concept of rate and equilibrium.
Know how to write Qc (and Kc) for various chemical equilibrium processes, when equations are given.
Know how to calculate Kc for a given equation and for the opposite equation.
Know how to calculate equilibrium concentrations when Kc and starting concentrations are given.
Understand and know how to use the concept of the LeChatelier's principle.
Know how to calculate pH of a solution if pKa (or Ka) are given.
Know how to calculate Ka, if pH is given.
Know how to identify conjugate pairs for acids and basis in equilibrium.
Know how to figure out whether a salt solution is acidic, basic or neutral.
Know how to calculate pH of a buffer.
Test 4, 20 November
12 questions, 100 points total
From a given list, decide which processes are spontaneous.
Predict the sign of entropy change for given examples and explain the reasoning.
Decide between pairs of compounds which one has higher entropy.
Understand how the change of Gibbs energy depends on temperature and how is its sign tied to changes in the Helmholtz energy and Entropy.
Know the relationship(s) between equilibrium constant and the Gibbs energy.
Calculate solubility, given the Gibbs energy.
Know how to balance a redox equation and show the oxidizing and reducing agents in the reaction.
Know the components of an electrochemical cell, understand
the concept of oxidation and reduction.
Final Test - Good things to know
200 points, 25 questions, 1 hour and 50 minutes of time
1. Know how to calculate energy needed to heat, melt and
vaporize certain amount of material.
2. Understand the concepts of body-centered, face-centered unit cells.
3. Know the Clausius-Clapeyron equation and know hot to use it.
4. Know how to calculate molality, molarity, pH of solutions.
5. Know the rules for naming (organic) compounds, know the names and structures for
organic functional groups.
6. Know the "named" equations and concepts (e.g., Arrhenius, Bragg,
Clausius-Clapeyron, Nernst, Gibbs, Guldberg-Waage)
7. Understand the Le Chatelier's principle
8. Know how to calculate empirical formula from elemental (combustion) analysis of an
organic compound.
9. Know what are spontaneous and nonspontaneous processes.
10. Know what is entropy, enthalpy, Gibbs free energy
11. Know the relationship between equilibrium constants and the Gibbs energy.
12. Understand the concept of oxidation, reduction, anode, cathode, cell, half-cell, salt
bridge, concentration cell.
Inception 30 August 2009
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