CH302 Random Musings—A very brief getting close to V-Day edition 1. We have a quiz today and I want to cover acid/base calculations well, so this musings will be brief. 2. There is a first exam next week. The 30 question types for the exam are posted below—they differ somewhat from the rough draft I posted last week. Details for exam administration, including the times and locations, will be provided on Tuesday. But be aware, that by last name, you will route yourself to a classroom next Wednesday evening for an exam that runs from 7:30 till 9:00 pm. By the way, do you really think it would be that hard to memorize these question types so that you could organize in your head what you need to be studying for the exam? Physical Equilibria 1 temperature dependence of phase changes 2 vapor pressure theory 3 salt dissociation in water 4 phase diagram interpretation 5 phase diagram navigation 6 calculating ΔH across phases transitions 7 gas solubility in liquids 8 ranking miscibility of liquids 9 Clausius Clapeyron equation 10 Van’t Hoff factor and colligative properties 11 colligative property application 12 colligative property calculation 13 colligative property calculation Chemical Equilibria 14 setting up K from equilibrium expression 15 appreciating the magnitudes of K 16 calculating equilibrium concentrations from K 17 determining reaction direction from Q and K 18 LeChatelier and reaction direction 19 LeChatelier and reaction direction 20 Van't Hoff equation and T dependence of K 21 relationship of ΔG to K Introduction to Water Equilbria 22 theory of auto-protolysis of water 23. temperature dependence of Kw 24. molar solubility calculation 25. ranking solubilities based on Ksp values 26. converting between pH, pOH, [H+] and [OH-] 27. ranking acidity and basicity from Ka and Kb 28. strong acid or base calculation 29. weak acid or base calculation 30. weak acid or base calculation 3. I have moved my Thursday 10 am office hours over to UTC 3.102 to provide more seating. 4. Many of you need to take a make-up because of a conflict with lab, lecture, work, etc. Don’t sweat it. Simply make arrangements to come to the make-up to be given from 6 till 7:30 on Sunday. I do not need to approve your taking the make-up so no e-mail to me is necessary. 5. I will hold a review session on the 30 question types this Sunday evening from 6 until 7 pm in this classroom. For those of you new to the class, this is a very good way to use 60 minutes as I will, question type by question type, introduce you to what you should expect to see and be able to do on the exam. 6. Calculators and the exam. Although quizzes remain calculator free, you will be able to use a calculator on the exam. You should still expect to see a lot of questions that are constructed to be solved without a calculator, but there will also be some of the more traditional “plug and chug” variety that would benefit from having your calculator. I don’t care what type you use. Also, please remember to bring your calculator—while we may have a few extras at the exam site, there aren’t many to hand out and there is no guarantee you will get one. 7. Practice exams. The TAs and I will each write a practice exam. I will write and post mine in the ChemPortal by Saturday and the TAs will write one that I will post on my web site by early next week. These practice exams will serve as the “worksheets” for the coming week.8. Where is that love poetry? I know that most of you don’t believe in love or would rather just study for a test, but remember that I am taking love poetry dedications and actual written love poetry for next Tuesday’s musings. If you remember, please send it to me over the weekend. 9. In the mean time, here is love poetry written by famous people who are poetry for a living. Oranges By Gary Soto The first time I walked With a girl, I was twelve, Cold, and weighted down With two oranges in my jacket. December. Frost cracking Beneath my steps, my breath Before me, then gone, As I walked toward Her house, the one whose Porch light burned yellow Night and day, in any weather. A dog barked at me, until She came out pulling At her gloves, face bright With rouge. I smiled, Touched her shoulder, and led Her down the street, across A used car lot and a line Of newly planted trees, Until we were breathing Before a drugstore. We Entered, the tiny bell Bringing a saleslady Down a narrow aisle of goods. I turned to the candies Tiered like bleachers, And asked what she wanted - Light in her eyes, a smile Starting at the corners Of her mouth. I fingered A nickel in my pocket, And when she lifted a chocolate That cost a dime, I didn’t say anything. I took the nickel from My pocket, then an orange, And set them quietly on The counter. When I looked up, The lady’s eyes met mine, And held them, knowing Very well what it was all About. Outside, A few cars hissing past, Fog hanging like old Coats between the trees. I took my girl’s hand In mine for two blocks, Then released it to let Her unwrap the chocolate. I peeled my orange That was so bright against The gray of December That, from some distance, Someone might have thought I was making a fire in my hands. Sonnet #18 William Shakespeare Shall I compare thee to a Summer's day? Thou art more lovely and more temperate: Rough winds do shake the darling buds of May, And Summer's lease hath all too short a date: Sometime too hot the eye of heaven shines, And oft' is his gold complexion dimm'd; And every fair from fair sometime declines, By chance or nature's changing course untrimm'd: But thy eternal Summer shall not fade Nor lose possession of that fair thou owest; Nor shall Death brag thou wanderest in his shade, When in eternal lines to time thou growest: So long as men can breathe, or eyes can see, So long lives this, and this gives life to thee. How Do I Love Thee? Elizabeth Barrett Browning How do I love thee? Let me count the ways. I love thee to the depth and breadth and height My soul can reach, when feeling out of sight For the ends of being and ideal grace. I love thee to the level of every day's Most quiet need, by sun and candle-light. I love thee freely, as men strive for right. I love thee purely, as they turn from praise. I love thee with the passion put to use In my old griefs, and with my childhood's faith. I love thee with a love I seemed to lose With my lost saints. I love with the breath,
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