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Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Chem 336 - 338 Lab LectureChem 336 - 338 Lab LectureC 336-01 Organic Chemistry Laboratory II and C 338-01 Organic Chemistry Laboratory II HonorsDr. Margareta SéquinOffice: Science 106C; Office Hours: Tu 11-12 pm, Th 1-2 pm and by appt.e-mail: msequin @ sfsu.edu Phone: 415-405-0315http:/ /userwww.sfsu.edu/~m s equ inFirst half of semester: Syntheses and methods of evaluationSecond half: C336 “Unknowns”. C338 Final Projecthttp:/ /userwww.sfsu.edu/~m s equ inPrerequisites: C336: passing grade (C or better) in Chem 333, 334; Chem 335 (can be taken concurrently). C338: B or better. Prerequisites will be strictly applied. A student who withdraws from Chem 335 must also withdraw from Chem 336 or Chem 338.Text: “Chem 334, 336, and 338 Organic Chemistry Laboratory”, SFSU 2005, with Mayo, Pike, Trumper, "Microscale Organic Laboratory", 4th Ed.; Wiley Custom Ed.Use your lecture text for reference!GradingC336 and C338: MiniQuizzes at the end of lab lectures, 2 pts. each C336 and C338: One Midterm Exam (100 points) C336: Final Exam (150 pts.) C338: Special Project Final Report, worth 150 pts. Lab reports: 20 points/ lab report 1 - 4. Lab reports V and VI will be combined and will be 30 pts. Unknown reports (C336) will be 30 pts. each. Lab Notebooks will be checked regularly. Your total class grade will be calculated as follows: 40% Exams % (Midterm, plus Mini Quizzes, plus Final Exam or Project, %) 30% Lab reports % 30% Lab preparation, notebook, effort, attendance, participation. Total class grade: >/=90% A; 85 -<90% A-; 80 -<85% B+; 75 -<80% B; 70 -<75% B-; 65 -<70% C+; 60 -<65% C; 55 -<60% C-; 50 -< 55% D+; 45 -<50% D; 40 -<45 D-; <40% FExp.1: Solvolysis of tert Butyl Chloride CCH3CH3CH3Cl+ H2O + HClCCH3CH3CH3OH1. IUPAC name for tert butyl chloride, for the alcohol product? 2. Why does changing the solvent medium affect the rate?60%water:40%acetone; 70%water:30%acetone; 80%water:20%acetoneSee Helpful Websites and your lecture text and:http://www.cem.msu.edu/~reusch/VirtualText/alhalrx2.htm#hal5Measuring the tenth–life in our reactionWhat is a possible by-product of our reaction? Does this affect our data?How would a one-third decrease of concentration of RX affect the reaction rate? CCH3CH3CH3Cl+ H2O + HClCCH3CH3CH3OHCalculations for Exp.1: Solvolysis of tert Butyl Chloride Reaction Rate = = -d(reactant)dt-d[RCl]dt= k[RCl]p.354-355 CCH3CH3CH3Cl+ H2O + HClCCH3CH3CH3OHCalculations for Exp.1: Solvolysis k dtt0= [RCl] d[RCl][RCl][RCl]o-= k dt-d[RCl][RCl]dt-d[RCl]= k[RCl] = kt-ln [RCl][RCl]o1.2.3.4.Calculations for Exp.1: Solvolysis = kt-ln [RCl][RCl]oat t10%, [RCl] = 0.90 [RCl]o = kt10%-ln 0.90[RCl]o[RCl]o-ln = kt10%0.90 = 0.10530.1053t10%= kUnits of k? How could you calculate k by using the half life?Arrhenius Equation and Calculation of Ea and A k = A e-Ea/RTWhat does Ea tell us about the reaction?ln k = ln A -Ea/RTPlot ln k vs. 1/T for each solvent mixtureln k1/Ty = b + m xR=1.987216 cal/K molArrhenius Plotsy = -13082x + 38.64y = -12362x + 35.503y = -11872x + 32.619-10-9-8-7-6-5-4-3-2-100.0032 0.00325 0.0033 0.00335 0.0034 0.00345 0.0035 0.003551/T (Kelvin)ln (k)60/4070/3080/20Next time:• Kinetics (conclusion)• Friedel-Crafts (Exp.2)• MiniQuiz on today’s class (Exp.1)Please fill out roll form and hand it in. Thank


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