CHEM_235_Sample_Final_Exam.pdf

CHEM_235_Sample_Final_Exam.pdf - CONCORDIA UNIVERSITY CHEM...

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CONCORDIA UNIVERSITY – CHEM 235/4 P HYSICAL C HEMISTRY II: K INETICS OF C HEMICAL R EACTIONS SAMPLE FINAL EXAM Page 1 of 3 N AME : S TUDENT ID N UMBER : You are allowed a two-sided formula sheet and a calculator. Answer all questions on the exam booklet. Show all working steps, as there will be no partial credit for guessing the answers. There are 6 problems, the exam is worth 50 points and you have 3 hours to write it. Return the exam sheet, the booklet and your formula sheet (with your name and student ID number clearly written on each of them) at the end of the exam. 1. Pharmacokinetics involves the determination of the rates of absorption and elimination of drugs by the organism. After intravenous injection of a drug, the plasma of a patient was analyzed periodically and the drug concentration was measured as: t (min) 30 60 120 150 240 360 480 c (ng.cm -3 ) 350 311 206 146 75 30 12 a) Determine the order of the elimination reaction. (3 pts) b) Calculate the rate constant and half-life of the process. (4 pts) c) Comment on the results you obtained.
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