Exam III Form A
November 9, 2010
IMPORTANT: On the scantron (answer sheet), you MUST clearly fill your name, your
student number, section number, and test form (white cover = test form A; yellow
cover = test form B).
Chemistry 112 Exam III Form A April 8, 2008
IMPORTANT: On the scantron (answer sheet), you MUST clearly fill your name, your student number, section number, and test form (white cover = test form A; yellow cover = test form B). Use a #2 p
Homework Worksheet #15!
Solids and Polymers
1. Fun with solid materials!
a. Please describe the properties of the following categories of solid materials (include MP, BP, hardness,
Homework Worksheet #12
Voltaic cell spontaneity, work, free energy (standard AND nonstandard conditions), electrolysis
1. Nernst, Gibbs relationship to Eo and equilibrium. Everything weve learned so far is inter-related.
a. Fill out this conce
Homework Worksheet #10
Solubility and Precipitation
1. Barium Carbonate is used in the manufacturing of TV screens and fireworks. Its also widely used in
rat poison, cement, and ceramic glazes. It is a sparingly soluble salt with a Ksp = 8.1 x
Homework Worksheet #3! Nuclear Chemistry!
Please check out this REALLY cool comparison of radiation dosages: https:/xkcd.com/radiation/
1. Predicting Decay Modes
a. Lets talk about the types of decay modes and why they happen. -decay, electron capture, an
Homework Worksheet #11:
Redox reactions and voltaic cells
1. Assigning Oxidation Numbers:
When tackling oxidation-reduction reactions, the first important step is determining oxidation numbers.
Oxidation numbers enable us to understand what is
Homework Worksheet #7!
Acid and Base Equilibria
In these practice problems, well delve more into the wonderful world of acid and base chemistry. We
shall take a more in-depth look at our friends aspirin, Benadryl, sodium hydroxide, and stomach acid.
Homework Worksheet #14!
Transition Metal Complexes
Metal centers! Ligands! A new equilibrium constant (yaaaaaay)! Fun colors! Cool magnetic properties!
1. Ligands are super important in transition metal complexes. For each ligand below, draw t
Have you ever seen how much energy is in a sugar cube? This may seem like an odd question (though
you will see how much chemical energy is released during combustion of a sugar cube soon!), but it
offers some interesting
Homework Worksheet #6!
Acids and Base-ics (yes its a pun)
Acids and Bases play integral roles in our everyday lives. They show up when storing chemical energy in
batteries, when allowing enzymes in our blood to properly function, and when gi
Homework Worksheet #8!
Polyprotic acids and Salts
1. Polyprotic acids
Ascorbic acid is an organic compound (structure below) that is also known as Vitamin C. Some animals
are able to produce ascorbic acid via conversion of glucose. Humans cannot, and ther
Homework Worksheet #13!
MO Theory (MO Problems)
1. Depicted below are a variety of molecular orbitals. Identify the molecular
orbital as bonding or antibonding. Explain.
2. Complete the following MO diagrams for the diatomic molecules, anions,
CHEMISTRY 112 EXAM 3
April 6, 2010
-1. Which one of the following statements is true?
All exothermic reactions are spontaneous.
All reactions with a positive increase in entropy are spontaneous.
All spontaneous reactions are fast.
Chem 112 Spring 2010 Exam 3 Answer Key 4 /6 /1 0
F o rm A
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. D A D B D D C A D C A A C D E B B A D B A E A C E
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15
Chemistry of the Elements, Mostly Non-Metals
Chemistry of the Elements
Chemistry of the Main Group elements
Occurrence of elements
Where in nature
State of elements
Isolation and purification
INTEGRATED RATE LAW
So far we have used differential rate laws
rate = -[A]/t = k[A]x (a differential eqn)
Integration gives [A] as a function of t (more
1st order reaction (x = 1):
ln([A]0/[A]) = 2.303 log ([A]0/[A]) = kt
Ore: deposit that contains enough metal that we can
Most metals are found in minerals.
Names of minerals are usually based on the location of
Other minerals are named after their colors: malachite
Bonding in molecules and solids
Where were heading: The chemistry of modern materials
(extended solids), after a brief look at some key aspects of
bonding in molecules (molecular orbitals)
How are atoms held together in molecules and solids?
How does this
Structure of atom
Products of Nuclear Decay
Rate of nuclear decay
Nuclear Binding energy
Review Structure of atom
Arranged by ATOMIC NUMBER
This is the nmber of protons in the nucleus
This is also the number of electrons in the atom.
ATOMIC WEIGHT is the average weight of the atom in amu
(atomic mass units => g/mole)
All atoms of a given eleme
Thermodynamics Entropy and Spontaneity
Kinetics vs. Thermodynamics
Rates of chemical reactions are controlled by
activation energy lower Ea, faster rate.
Collision frequency; collisions, rate
Equilibrium is reached