CH301 Random Musings, October 27, 2010 1. There will be a major exam in this class on Wednesday, October 27th from 7:30 till 9:30 pm. Details with respect to exam administration are as they were presented for the last exam; in a nutshell, show up on time, stop when you are told to stop. Bring a pencil, your UT identification, and as little else as possible. Your exam locations are as follows: WEL 2.224 Last name A through M UTC 2.112A Last name N through Z I may decide to have the exam administered in Welch 2.224 if enough students will be taking the Sunday exam. Stay tuned. 2. Make up exam. I am allowing unfettered access to the make-up exam (in other words, anyone can take it.) But I need a fairly firm head count today in class. So make you mind up now so we can print the accurate number of exams. If you are taking the make-up, please show up Sunday night from 6 to 8 pm in this classroom. 3. Here is a repeat of the question types on the exam, the chapter from which the material originates, and the worksheet where you can find similar questions. number chapter Worksheet Problem type 1 Chapter 3 Worksheet 6 Ranking bond polarity 2 Chapter 3 Worksheet 6 Assigning molecule polarity from VSEPR 3 Chapter 3 Worksheet 6 Assigning molecule polarity from VSEPR 4 Chapter 3 Worksheet 6 Bond angles from VSEPR 5 Chapter 3 Worksheet 6 VB theory of hybrid orbits 6 Chapter 3 Worksheet 6 Electronic geometry from VSEPR 7 Chapter 3 Worksheet 6 Molecular geometry from VSEPR 8 Chapter 3 Worksheet 7 Number of s and p bonds in molecule 9 Chapter 3 Worksheet 7 AOs that comprise MOs in a bond 10 Chapter 3 Worksheet 7 MO theory 11 Chapter 3 Worksheet 7 Filling MOs of diatomic molecules 12 Chapter 3 Worksheet 7 Calculating bond order from MO 13 Chapter 3 Worksheet 7 Assigning paramagnetism from MO 14 Chapter 3 Worksheet 7 Ranking bond length from bond order 15 Chapter 3 Worksheet 6 Identifying delocalization (resonance) 16 Chapter 4 Worksheet 8 Ideal gas law history 17 Chapter 4 Worksheet 8 Gas law change of state calculation 18 Chapter 4 Worksheet 8 Calculating MW, M or r from PV=nRT 19 Chapter 4 Worksheet 8 Reaction stoichiometry and PV=nRT 20 Chapter 4 Worksheet 8 Calculation of relative ratio of gas speeds 21 Chapter 4 Worksheet 8 Ranking non-ideality of gases 22 Chapter 4 Worksheet 8 Gas non-ideality theory 23 Chapter 5 Worksheet 9 IMF theory 24 Chapter 5 Worksheet 9 Assigning IMF to molecules 25 Chapter 5 Worksheet 9 Assigning IMF to molecules 26 Chapter 5 Worksheet 9 Defining physical properties 27 Chapter 5 Worksheet 9 Ranking physical properties by IMF 28 Chapter 5 Worksheet 9 Ranking physical properties by IMF 29 Chapter 5 Worksheet 9 Ranking physical properties by IMF 30 Chapter 5 Worksheet 9 Assigning type of solid to compounds 31 Chapter 2 Worksheet 5 Ranking lattice energies 32 Chapter 2 Worksheet 5 Assigning formal charge 33 Chapter 2 Worksheet 5 Assigning structure based on formal charge 34 Chapter 2 Worksheet 5 Ranking bond length, energy and EN4. I held a review session on last night. The notes are posted on line in the ChemPortal Assignments. Travis will hold a review session tonight: Tuesday, October 26 9:00 pm - 10:00 pm WCH 1.120 5. All of the worksheets, practice exams and answer keys for the upcoming exam are now posted. Details for the four worksheets are below: • Worksheet 6 from the beginning of Chapter 3 was the subject of quiz 3—it covered 3-D drawing of covalent compounds using VSEPR and VB theory. Eight questions from the exam will come from this worksheet. • Worksheet 7 covers VB and the MO theory from the end of Chapter 3 and contributes 7 questions to Exam 2. • Worksheet 8 is on gases from Chapter 4 and contributes 7 questions to Exam 2. • Worksheet 9 on IMF and liquids from Chapter 5 contributes 8 questions to Exam 2. 6. I have provided a couple of practice exams: • On Friday I posted a practice exam on the ChemPortal. It is likely harder than the exam. • On Sunday the TAs posted a practice exam 2 based on the 34 question types I provided. I encourage you to take these practice exams under normal testing conditions only after you have learned a significant amount of the material so that you can more accurately test what you know. 7. This may sound like a broken record, but as we begin preparation for the exam 2, please do not give up if you are doing poorly. There are still 6 weeks until the final and if you can figure the course out by then, you can receive the grade you want. Those of you discouraged that your study habits have not yet yielded results need to keep after things. Please contact me and I will arrange for you to make an appointment so we can discuss ways to improve in time for the final. 8. Dave longs for simpler times. Halloween used to be so simple. You put on a cheap plastic costume with a mask that made you smell your own breath, walked around you neighborhood for an hour on the 31st getting candy, went home and listened to the horror stories about the kid in Iowa who got a pin in his Milky Way bar or the one in Illinois with a razor blade in an apple, and then carefully ate your candy while wondering if you were going to die. And then around age ten, while trick or treating by pulling your shirt over your head to be the headless guy, some old lady tells you that you are too old to trick or treat and you slink home, what a loser. And Halloween was over. These days it seems that Halloween goes on for a full week with all the safe parties at schools that seem more dangerous than actual trick or treating and your kids go home with massive amounts of plastic crap and bad candy you have to throw away before going in the house. And you have to decorate your yard with realistic severed limbs and freeze to death with 100,000 people on 6th street. I really don’t get it the appeal. By the way, I once gave a lecture dressed as a super sized Slurpee from 7-11. Surrounding yourself in cardboard and placing a giant red bean bag on your head does not make for the easiest of lecturing styles—but it got me Judy as an assistant—she wasn’t sure she wanted to work for me until she read an article somewhere that mentioned my Slurpified lecture. These days, I dress in orange with a big belly so I look like a pumpkin. Every Halloween for many years I
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