Chem15 Lab Manual F09 - LABORATORY MANUAL CHEM 15...

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LABORATORY MANUAL CHEM 15 Analytical and Bioanalytical Chemistry Fall 2009 Instructor: Professor Jay Groves Department of Chemistry University of California, Berkeley
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C HEM 15 F ALL 2009 - 1 - T ABLE OF C ONTENTS Page Introduction to the Laboratory. ........................................................................................................ 2 Laboratory Safety. ............................................................................................................................ 5 Requirements and Policies. .............................................................................................................. 7 Lab Notebooks, Reports & Grading . ............................................................................................... 8 Stockroom Policies . ....................................................................................................................... 10 Treatment of Analytical Data. ........................................................................................................ 11 Exp. 1 Volumetric, Gravimetric & Statistical Methods. ........................................................... 13 Exp. 2 Acid-Base Reactions . .................................................................................................... 23 Identification of an Unknown Weak Acid Exp. 3 Potentiometry . ............................................................................................................... 35 Titration of a Halide Mixture Exp. 4 Determination of Fluoride Ion Using an Ion-Selective Electrode. ................................ 45 Exp. 5 Coulometry. ................................................................................................................... 55 Determination of Thiosulfate Ion with Electrochemically-generated Triiodide Ion Exp. 6 Spectrophotometry . ....................................................................................................... 63 Simultaneous Determination of Co(III) and Cu(II) Solution Spectrophotometric Determination of Manganese Ion Exp. 7 Protein Folding. ............................................................................................................. 75 Exp. 8 Gas Phase Chromatography . ......................................................................................... 89 Fuel Analysis
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C HEM 15 F ALL 2009 -2- I NTRODUCTION TO THE L ABORATORY Welcome to the Chem 15 Laboratory! The lab sessions are an important part of Chem 15 and consequently your lab marks will make up a significant fraction of your final grade (50%, including problem sets). Although there will be overlap with the lectures, the labs will complement rather than duplicate the lectures so you should be prepared to learn new material and new skills through the lab exercises. You will find that much of what you learn in the Chem 15 lab can be applied to your other studies because practical quantitative analysis is just sound training in the methods used by reputable, professional scientists. A successful Chem 15 graduate leaves this course a more mature, proficient and critically aware scientist than when she or he arrived. P REPARATION FOR LABS In order to be able to use your time in the lab efficiently you must come to the lab prepared!! Pre-lab preparation for Chem 15 labs will involve more effort on your part than was the case for Chem 1. This means that you will have to look up more information and learn some new concepts independently before each lab. * Come with a plan. You should come to the lab with a clear idea of what activities you are going to perform during the lab. * Use flowcharts. We strongly suggest that you make a diagram, a picture or a flow chart in your lab book instead of "highlighting" your lab manual. * Estimate and check. Perform "back-of-the-envelope" or "order-of-magnitude" calculations before and during the labs to check if an answer is sensible, if the volume of solution needed is one mL or one L etc. * Know about the chemicals. Make a list of the chemicals you will be using and look up their properties, hazards, disposal etc. Since you already have at least two semesters of chemistry under your belt, we expect you to be able to handle more complicated or hazardous chemicals and procedures -- this means you should take more responsibility for finding out for yourself about the materials you are using.
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Chem15 Lab Manual F09 - LABORATORY MANUAL CHEM 15...

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