Exam1A - Chemistry 41 Exam 1 Name KEY (Please Print) PID#_...

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Chemistry 41 Name KEY Exam 1 (Please Print) PID#____________________________ Row _______Seat #________ Honor Pledge: I have neither given or received help on this exam, nor have I seen anyone else do so. ______________________________(Signed) 1. 2. 3. 4. 5. 6. 7. 8. 9. Total ________ 15 10 10 10 15 10 10 10 10 100 SHOW YOUR WORK CIRCLE NUMERICAL ANSWERS 1.(15pts) What chromatographic technique would be best for the following analyses? a) separating the involatile pollutants in drinking water. Liquid Chromatography b) separating compounds responsible for the aroma of red wine. Gas Chromatography c) determine the specific presence of cocaine in urine. Affinity Chromatography d) separating sodium and potassium in a blood sample. Ion Chromatography e) determine the molecular weight of the polymer polyethylene glycol. Gel Permeation Chromatography 2.(10pts) For a given chromatographic column, the constants in the Van Deemter equation are: A = 1.65 mm; B = 25.8 mm mL/min; and C= 0.0236 mm min/mL . What is the height equivalent for a theoretical plate if the mobile phase flow rate is: 30 mL/min? mm
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Exam1A - Chemistry 41 Exam 1 Name KEY (Please Print) PID#_...

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