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Chemistry 102 Syllabus and Schedule Spring 2005 Dr.
David L. Zellmer Text: Skoog,
West, and Holler, Fundamentals of Analytical Chemistry, 8th
Edition (required) Other required materials: Safety glasses, bound laboratory notebook, and scientific calculator. There are several computer assignments. Although computers are available in the Science Building and elsewhere on campus, it is assumed that you own your own machine. The type of computer is unimportant, but it must be capable of running a fairly recent version of an advanced spreadsheet such as Microsoft Excel. E-mail and Internet access are required to get all the information provided for this course. Be sure to check your e-mail account listed in Blackboard and on the Class Roster.
How your grade is calculated: You must have a passing grade (40% in lecture, and about 60% in lab) both in lecture and in lab, in order to pass the course. Lecture and lab grades are combined by adding 3/5 of your % lecture score to 2/5 of your % lab score. Assuming you have a passing grade both in lecture and in lab, the combined score will be used to compute your letter grade for the course. 85% will be an A for sure; 70% will be a B for sure; 50% or more is required to get at least a C. Borderline grades just below the stated A and B cut lines will be decided from diligence in the homework plus an evaluation of the pattern of overall performance in the course. The most common helpful pattern is evidence of improvement and ultimate competence. Reports are generally formal write-ups of experimental procedures and results for those lab experiments where a reliable comparison of your results with a standard are not possible. Reports are due no later than 10 minutes from the beginning of lab one week from the Monday or Tuesday following the last scheduled day for the experiment. (The last GLC lab report is due by noon Monday of the final exam period.) Late penalties of 5 points per lab day will be assessed for late reports and must be turned in within 10 minutes of the beginning of lab to avoid an additional late day penalty. The written GLC report due on Noon Monday of final exam week will have late penalties of 10 points per half-day late. The following lecture schedule is tentative and may be revised, due to the need to cover laboratory topics before the experiments begin. In many cases it will be necessary to interrupt the detailed lecture discussion of a topic in order to provide introductory information on an impending experiment. Some lecture periods will be devoted to in-class problems. The problem assignments given below are due when announced in class, generally at the conclusion of the material covered by them. Most of these have the answers in the back of the book. To get full credit for your homework, you must turn in complete solutions on the day specified. Answers simply copied from the back of the book will not be accepted. Late homework can be turned in for reduced credit up to the day of the exam that covers that homework; after that it will not be counted. Some homework assignments will require the use of a computer spreadsheet (ss). It is assumed that all of you own or have ready access to a computer. Microsoft Excel will be used to illustrate all spreadsheet assignments. Other spreadsheets may be used if you feel you have the ability to translate Excel-specific functions. The Macintosh and PC versions of most spreadsheets are almost identical, so computer type is not a factor. The chapters assigned for reading will often contain much more material than is covered in the class. Concentrate on the topics emphasized by your instructor, or on material needed to solve assigned problems. In most cases it is not necessary to master all of the material in your text. Statement on Cheating and Plagiarism. Please see the statement on Cheating and Plagiarism in the current schedule of courses for University regulations and penalties. In Chemistry 102, any work that you copy from another student or copy from the literature, that you represent as your own, will be considered plagiarism. Penalties can range from loss of all points on an hour exam or lab report, to dismissal from the course with an F, to expulsion from the University. A good portion of 102 deals with the production of lab reports that follow the same ethical standards used for professional papers, so violations will be treated very seriously. Examples: The following list of examples and penalties is not all-inclusive, but does illustrate situations that have arisen in the past. The instructor reserves the right to apply penalties he/she deems appropriate for other examples of cheating and plagiarism that fall under the University regulations. (1) A student turns in a lab report on Gas Chromatography. Several paragraphs in the theory section are copied from a textbook or downloaded from the Internet. No references to the origin of this information are given. A few minor rewordings are attempted to make it look like it wasn't copied. Penalty: The student is given an F for the entire course. (2) A student turns in a lab report on Gas Chromatography. The theory section is copied directly from a textbook, but referenced. Penalty: Loss of all points for the Theory section. The reference prevented this from being called plagiarism, but since the student is being graded on the quality of his or her own explanation of the relevant theory, no credit is possible. (Remember, quoted references should be very brief and should be used very sparingly. The report must be your own work.) (3) The instructor agrees that two students working on an instrument may share the data from one of the standard calibrations, but reminds them that all lab reports are to be solely the work of the author and that workup of the data collected must be done individually by each student. Student "A" works up the data on a spreadsheet, complete with statistical analyses and graphs. Student "B" asks to borrow a copy of this spreadsheet so that he/she can "study it." Except for minor label changes or shifting of positions, report A and B have virtually identical data workups. It is obvious that student B just used the work of student A. Penalty: BOTH Student A and Student B get zero points on the entire report, since it cannot be determined who copied from whom. "We just worked together" is not a defense for this kind of duplication. (4) A student turns in a lab report that looks suspiciously familiar. Checking with a previous semester, it is discovered that the student had taken the computer file from a previous student, made a few minor changes, then printed out the report and turned it in. Penalty: The student is given an F for the entire course. (5) A student turns in a lab report that seems suspicious. A search of the Internet uncovers that it was downloaded from a Lab Reports web site. Penalty: The student is given an F for the entire course. Remember: Do all your own writing and data workups and all will be well. If situations arise where lack of time or instruments requires sharing of certain data, get approval from your instructor first, then reference the exact source of the data used. Shared data workups or shared written material may never be used on Chemistry 102 lab reports or other assignments. Chemistry 102 complies with University policies on students with disabilities. The list of topics, readings and homework assignments given below are listed by the approximate week in the semester they will be covered, and may change as the semester progresses. Please see the Brief Lecture and Lab Schedule for a better estimate of the dates for the current semester as they work around the Holidays. Your instructor will tell you when the homework assignments are due. Week 0-1 Introduction to the course. Introduce gravimetric chloride experiment. Review mass, volume, concentration units and calculations. Particle size & purity. Read Ch. 1 (Introduction); Ch 2 (Chemicals, Apparatus, and Unit Operations of Analytical Chemistry); Ch 3 (Using Spreadsheets in Analytical Chemistry); Ch 4 (Calculations used in Analytical Chemistry) ; Ch 12 (Gravimetric Methods). Problem Set: Basic1: Ch 4, p. 87, 7, 9, 11, 13, 14, 19, 25, 29, 37; Spreadsheet 01 (Handout--Computing and Plotting) due end of week 2. Grav1 Ch 12, p. 334, 10, 18, 22, 24, 28. Week 2 Begin Statistics. Read Ch 5 (Errors in Chemical Analyses); Ch 6 (Random Errors in Analyses). Statistical methods and computer calculations with spreadsheets. Read Ch 7 (Statistical data treatment and evaluation), Read Ch 8C (Standardization and Calibration) Statistics web pages, Excel spreadsheet web pages. Problem Sets: Stat1 Ch 5, p. 103, 9, 10; Ch 6, p. 139, 7, 17; Ch. 4, p. 68: 1, 8 (Stat1 covers mean, median, range, CV, pooled s). Stat2: Ch 7, p. 170, 4, 5, 6, 7, 9, 11, 16 (Stat2 covers 95%CL, CL of two means, Q-test, and LLS analysis) Spreadsheet 02 Ch 8C, p. 221, 15 (Do LLS as in example on p. 202 or from my website. Omit the ANOVA.) Week 3 Intro Vol Cl Exp. Solubility product equilibrium calculations. Read Ch 9B-5 (Chemical Equilibrium, Ksp), Ch 10 (ionic strength and activity); Ch 11 (Equilibrium calcs in complex systems--charge and mass balance); Problem Set: (Do each set as the topic is covered.) Ksp1 Ch 9B-5, p. 264, 8, 9, 10, 11, 13, 15; Ionic 1 Ch 10, p. 279, 7, 8, 10. Ksp2 Ch 11, p. 309, 4, 5, 11 (see example p. 291 and my website) Week 4 Finish Ksp Introduce Acid/Base Concepts and Experiment on Friday Read Ch 9, Acid/Base sections (Strong acids and bases, mostly monoprotic weak acids and bases.) Problem Set: All Ksp problems should be completed by now. (see Week 3) Week 5 Monday: Holiday -- Presidents Day (Monday, 21 Feb 2005) Wednesday: Review for HE 1. Continue Acids and Bases. Friday:
Hour Exam 1 through Ksp and Ionic Strength (Friday, 25 Feb 2005) Problem Set: (For Acid/Base problems, see Week 6.) Week 6 Continue treatment of acid/base equilibria. Read Ch 9, Acid/Base sections (Strong acids and bases, mostly monoprotic weak acids and bases.); Ch 14 (Principles of neutralization titrations) Problem Sets (do each set as topic is covered): AB1 Ch 9, p. 264 (SA, SB, WA, WB): 4, 6, 7, 20, 21. Ch 14, p. 391: 15, 19, 20, 21. AB2 Ch 9, p. 265 (buffers): 26, 27, 29. Ch 14, p. 392: 29, 32, 37. AB3 (monoprotic titr curves & alphas) Ch 14, p. 393: 38, 41, 42, 44. Week 7 Introduce EDTA Experiment. Advanced acid-base equilibria and pH effects on Complex Formation. Read Ch 15 (Polyprotic A/B Equilibria); Ch 16 (Acid/Base Titrations) Problem
Sets (do each set as topic is covered): AB4 Ch 15, p. 425 (polyprotic): 6, 7, 8, 9, 10, 16, 26, 31. AB5 Ch 16, p. 445 (real AB analyses): 29, 37. Week 8 Complete discussion of acid-base equilibrium. Complete discussion of Complex Formation Equilibria. Read Ch 17 (EDTA Titrations). Introduce the spectro experiment on Friday. Problem Sets: CF1 Ch 17, p. 484 (messy vol calcs): 21, 23, 25. CF2 Ch17, p. 485 (equilibrium and titr curves): 31, 32. *** Spring Break
3/21/05 - 3/25/05 *** Week 9 Intro Spectrophotometry & Spectro Experiment. Read Ch 24 (An Introduction to Spectrochemical Methods), Ch 25 (Instruments for Optical Spectrometry). Review for HE2. Problem Set: See Week 10 Hour
Exam 2 on Acid/Base and Complex Formation. Wednesday, 30 March 2005 Holiday,
Caesar Chavez, Thursday, 31 March 2005 (Lab only) Week 10 Spectrophotometry
continues. Read Ch 26 (Molecular Absorption Spectroscopy), Ch
27 (Molecular Fluorescence Spectroscopy, Ch
28 (Atomic Spectroscopy). Friday: Introduce Redox Cu Experiment Problem Set: Spec1 (%T and Beer's Law) Ch 24, p. 740: 18, 22, 24, 25; Ch 25, p. 782: 23. Spec2 (Working Curves--do with spreadsheet) Ch 24, p. 741: 27, 28; Ch. 26, p. 823: 15; Ch 28 (Atomic Spec), p. 872, 15. Week 11 Introduction to Electrochemistry. Half-reactions, electrochemical cells, use of the Nernst equation. Intro Redox experiment. Read Ch 18 (An Introduction to Electrochemistry) Problem Set: EC1 (redox eqns--balance the half reactions first) Ch 18, p. 519: 7, 11, 12. EC2 (Nernst) Ch 18, p. 519: 13, 16, 18. Week 12 Complete Cells & Nernst; Oxidation-Reduction Titrations. Read Ch 19 (Potentials and Redox Titrations), Ch 20 (Applications of Redox Titrations) Problem Set: Redox1 Ch 19, p. 556 (cells and titration curves): 8, 15. Redox2 Ch. 20, p. 583 (messy redox vol calcs): 28, 30, 32, 43, 49. Week 13 Introduce GLC Experiment Potentiometric methods and Ion Selective Electrodes. Read Ch 21 (Potentiometry), Problem Set: ISE Ch 21, p. 630: 19, 21, 79. ; Review
for HE3 Hour
Exam 3 on Spectro and Redox Part 1.
Friday, 29 April 2005 Week 14 Separations (liquid-liquid,
ion exchange). Chromatography,
especially HPLC. Read Ch 30 (Introduction to Chromatography), Ch 31 (Gas Chromatography), Ch 32 (High Performance Liquid Chromatography). Week 15 Complete Separations. Review for Finals. Problem
Set:
Sep Ch 30, p. 943: 13; Ch 31, p. 971:
21. This is the last problem set. Finals The Final Exam is scheduled for 0845-1045 Wednesday 18 May 2005. Students must turn in their GLC report by 12 noon on Monday of Finals Week; after that time, no credit will be given for this last report. Disclaimer: Information on this syllabus is subject to change as announced in class. Students are expected to be in class and are responsible for any announced changes. |