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3. Diazepam tablets are supplied in 2-, 5-, and 10-mg increments. Suppose several tablets are received in a laboratory as evidence and using the Physician's Desk Reference, an analyst can tentatively identify them as Valium, 10mg. Suppose further that you learn that the tablets also contain anhydrous lactose, starches, dyes, and calcium stearate. Describe a method for isolating the active ingredient from fillers, using an LLE scheme. Justify and explain each step of the method. 4. Quinine (C20 H24N2O2) is a dibasic molecule with pKa's of 5.07 and 9.7. It is encountered as a diluent (cutting agent) for heroin. To extract quinine from an aqueous solution, what pH should be used and why?

3. Diazepam tablets are supplied in 2-, 5-, and 10-mg increments. Suppose several tablets are received in a laboratory as evidence and using the Physician's Desk Reference, an analyst can tentatively identify them as Valium, 10mg. Suppose further that you learn that the tablets also contain anhydrous lactose, starches, dyes, and calcium stearate. Describe a method for isolating the active ingredient from fillers, using an LLE scheme. Justify and explain each step of the method. 4. Quinine (C20 H24N2O2) is a dibasic molecule with pKa's of 5.07 and 9.7. It is encountered as a diluent (cutting agent) for heroin. To extract quinine from an aqueous solution, what pH should be used and why?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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3. Diazepam tablets are supplied in 2-, 5-, and 10-mg increments. Suppose several tablets are received in a laboratory as evidence and using the Physician's Desk Reference, an analyst can tentatively identify them as Valium, 10mg. Suppose further that you learn that the tablets also contain anhydrous lactose, starches, dyes, and calcium stearate. Describe a method for isolating the active ingredient from fillers, using an LLE scheme. Justify and explain each step of the method. 4. Quinine (C20 H24N2O2) is a dibasic molecule with pKa's of 5.07 and 9.7. It is encountered as a diluent (cutting agent) for heroin. To extract quinine from an aqueous solution, what pH should be used and why?
Transcribed Image Text:3. Diazepam tablets are supplied in 2-, 5-, and 10-mg increments. Suppose several tablets are received in a laboratory as evidence and using the Physician's Desk Reference, an analyst can tentatively identify them as Valium, 10mg. Suppose further that you learn that the tablets also contain anhydrous lactose, starches, dyes, and calcium stearate. Describe a method for isolating the active ingredient from fillers, using an LLE scheme. Justify and explain each step of the method. 4. Quinine (C20 H24N2O2) is a dibasic molecule with pKa's of 5.07 and 9.7. It is encountered as a diluent (cutting agent) for heroin. To extract quinine from an aqueous solution, what pH should be used and why?
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