Pre-lab Guidelines for titration lab Period 1Pre-lab guidelines for Titration Lab Period 2SPRING 2002 CHEM 14CL Expt. 8 - The Determination of the Concentration and Acid Dissociation Constants of an Amino Acid Pre-lab is due at the beginning of the lab section. Pre-lab report MUST be written inside your LAB NOTEBOOK. PRE-LAB GUIDELINES FOR TITRATION LAB PERIOD 1 PERIOD 1 PRELAB IS DUE ON EITHER 4/4 OR 4/5 DEPENDING ON THE DAY OF YOUR REGULARLY SCHEDULED LAB. (I) Introduction - write down the goal(s) of this experiment as well as the experimental techniques that you will be using in order to achieve such goal(s). (II) Flowchart of procedures for the ENTIRE experiment and cite the reference for the procedures. (III) Study questions - complete ONLY questions 1,2 &3 (MUST show all work for full credit) NOTE: Question 3 (see page 94) should read 3.29 ml of HCl and 18.61 ml of NaOH Hint: For question #3, assume that the 10-ml unknown solution contains both the A & A- forms of the amino acid. Refer to the lab manual for the structures of the A & A- forms of the amino acid. Also, when solving question #3, think about what chemical reaction took place when HCl was added to a mixture of A & A-. How about when NaOH was added to a mixture of A & A-? PRE-LAB GUIDELINES FOR TITRATION LAB PERIOD 2 PERIOD 2 PRELAB IS DUE ON EITHER 4/9 OR 4/10 DEPENDING ON THE DAY OF YOUR REGULARLY SCHEDULED LAB. NO NEED TO CONTRUCT A FLOWCHART OR WRITE A INTRODUCTION FOR PERIOD 2 PRELAB. Complete ONLY the study questions assigned below. Complete study questions 1a & 1b ONLY under the section "Prelab Assignment - Period 2" (see page 95). (MUST show all work for full credit) IMPORTANT: ALL the pK in the problems are pKa NOT pKb.There is NO pre-lab for period 3 of this
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