CH 302 Random Musings, Bottom of the Ninth 1. Sadly, the semester has come to an end. Today in class I will briefly look at famous batteries and catalysts, hand out your very own brass penny, make ice cream for 500 people, and review issues related to examinations and final grades. 2. Evaluations. It is your responsibility as a student to complete course instructor evaluations for every course you take. The college is participating in a pilot effort to make these evaluations electronic and I have agreed to use this method. You should have received an electronic invitation to complete this survey, but if you haven’t, you can do so by going to the following web link: https://utdirect.utexas.edu/diia/ecis/ and opening up the survey for CH302 unique number 53015. You have until 5/ 4/2007 (this Friday) to complete the survey. Thanks for remembering to do this. 2. Reprinted below are the grading cutoffs for the course. There are both the original cutoffs that reflect a 90%, 80%, 70% cutoff and the new cutoffs of 87%, 77%, 67%, 57% and apply IF you turn in all your extra credits. The weight of the extra credit depends on the grading scheme but corresponds to 1% of the grade for each extra credit handed in. Do not worry about which of these grading schemes applies to you. I will assign the one that best benefits you. Exemption scale (700 max) Cumulative scale (1000 max) Final Exam scale (300 max) Letter Old cutoff New cutoff Old cutoff New cutoff Old New cutoff grade (3 EC scores) (3 EC scores) cutoff (3 EC scores) A 630 609 900 870 270 261 B 800 770 240 231 C 700 670 210 201 D 600 570 180 171 4. Extra credit points. You have had the chance to 3% back on your grade from extra credit. There will certainly be some errors in recording your extra credit what with the manual recording process so please do not panic if points are missing. I will reconcile what I have for your totals versus what you say you have done the green sheet you will turn in today. If there is a contradiction, I will e-mail you to confirm. I need these extra credits to determine exemption, so please get them in as soon as possible. 5. If you are missing HW Service scores or believe that they are in error, it is your job to fill out a regrade request. After this week you will need to e-mail Mazen to discuss the procedure for fixing any errors. We may set up a time for you to come in during dead days if there are a lot of you with grading errors. 6. By Thursday around midnight I will have determined whether the exemption cutoffs will vary from the cutoffs posted above. Remember that the Homework Service totals DO NOT reflect my grading scheme so ignore the grades it assigns and instead simply add up your three exams and your four best quizzes. Compare that result to the appropriate cutoff above or any new cutoff value I assign. 7. You have been a very fine class and the grades will reflect this. Expect to see about 150 exemptions and the final overall grade distribution: 200 As 170 Bs 90 Cs 30 Ds 10 Fs (most of whom did not complete the course).8. Telling me what I should know. In a class of 500, it is possible I will make mistakes or that I will not find out things you want me to know. So please fill out the green form, “Things I want Dr. Laude to know”, if there is anything of an academic or non academic nature that will assist me in deciding your grade. I will respond to each of these individual so take the opportunity seriously. For example, if you and I have made some kind of arrangement about make-ups, missing quizzes, incompletes, or something significant has come up this semester, please write it down and turn it in. 9. A request for EVERYONE about final grades: I took great pains to devise a thorough grading scheme for this course. It is clearly identified in the syllabus. Read it before you start asking redundant questions. It is what it is. Be aware that I will not do for a single student what I wouldn’t do for everyone, so please do not expect special favors. Things you need to know about Exam 3. 10. Neal has provided a practice exam 3 that I have posted on the web. 11. On Sunday I gave a review on the 30 question types on Exam 3 and the hand written notes from that session are posted on line. 12. Standard help sessions and academic communities will be held throughout the week. My help sessions are in the classrooms. 13. Exam 3 will be given on the last day of class during the regular exam time. The exam will consist of 30 equally weighted questions worth a total of 180 points. I have included an updated list of question types that removes the transition metal material and replaces it with biopolymer questions. 14. I am forgoing a posting of the normal format and procedures for exam 3 and remind you that the usual exam rules apply. Your location for the exam is as follows: Last name A-K, WEL 2.224. Last name L-Z , Hogg Auditorium I do apologize to those of you discomforted by Hogg Auditorium but would like to point out that in all the time I have checked, there has never been a difference in the actual average grade between the two rooms. 16. Some advice as you study for exam 3: Be aware that this test is light on calculations (only about 40% of the test) and heavy memorizing stuff, which is the nature of an exam filled with descriptive chemistry. Like it or not, those of you who really understand my notes on organic nomenclature, biomolecules, main group chemistry, catalysts and batteries, will breeze through this material and it will be a short test. It is definitely a “you know it or you don’t” experience for many of these problems. And quiz 5 is definitely a barometer for much of the kinetics and electrochemistry. Nothing will be surprising on the exam.Exam 3 Question Types Question Types from Electrochemistry 1 relating E, ΔG and K 2 stoichiometry calculation from charge or current 3 calculating cell potentials 4 famous batteries Question Types for Kinetics 5. assigning rate expressions 6. relating reaction order to rate 7. units of rate constants 8. method of initial rates 9. integrated rate law calculation 10. integrated rate law calculation 11. extracting information from straight line plots 12. kinetic theory—collision 13 kinetic theory—transition state 14. combined Arrhenius calculation 15. reaction mechanisms 16. Ea and potential
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