Chem 30A Winter 2006 Prof Garrell Chem 30A Week 5 Synopsis Stereochemistry Organic Acids Bases Goals and Assignments for Feb 6 through Feb 10 TOPICS Molecules with more than one stereocenter Fischer projections Optical activity optical purity enantiomeric excess EE Br nsted Lowry acids bases Ka pKa and the origins of their values Position of equilibrium in acid base reactions Lewis acids bases GOALS Be able to convert between perspective views and Newman and Fischer projections Understand why the physical properties of stereoisomers may be similar or different Understand optical activity and its significance in the laboratory Be able to use polarimetry data to determine optical purity and enantiomeric excess Be able to identify Br nsted Lowry Br nsted acids and bases conjugate acids and bases Be able to identify Lewis acids and bases conjugate acids and bases Be able to write chemical equations for acid base reactions and to use curved arrows to show the flow of electron pairs Develop a feeling for the physical meaning of equilibrium constants and relative pKa s Be able to correlate acidities and basicities with molecular structure ASSIGNMENTS Background As needed review chapter s on acids and bases from your general chemistry course the prerequisite to Chem 30A We are not explicitly assigning chapters or problems from a general chemistry text but are assuming that you understand and are comfortable with the following topics and skills Sections BFI 4 1 and 4 2A recaps some of that material They will not be covered in lecture but you are responsible for it classifications Arrhenius Lewis Br nsted Lowry and conjugate acid conjugate base concept acid base equilibria Ka Kb pH pKa including how they are calculated common strong acids and bases e g HCl H2SO4 NaOH etc common weak acids and bases e g CH3COOH Readings Brown Foote Iverson 3 3 3 4 25 1 4 1 4 6 PROBLEMS from BFI 4th edition Ch 3 See week 3 synopsis Ch 4 It is strongly recommended that you do all the problems For multipart problems do as many as you need to get it Optional For tutorials and additional practice problems on acids and bases check out Dr Hardinger s website http web chem ucla edu harding Upcoming deadline Requests for midterm exam regrades must be submitted by10 AM February 13 2006 No exceptions Chem 30A Fall 2001 Please read and follow the instructions in the syllabus Week 2 Synopsis p 2 of 2
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