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16 Nov 2019
Comment on the relative solubilities of the following compounds: Silver bromate, Ksp = 5.5 times 10^Silver sulfide, ksp = 6 times 10^51 Magnesium carbonate, 3.5 times 10^Manganese hydroxide, ksp = 1.6 times 10^-13 Quinine is a diabasic molecule with pKa's 4.1 and 8.5. It is encountered as a diluent for heroin. To extract quinine from as aqueous solution, what pH should be used and why? Diazepam (Valium) is a member of the benzodiazepine family drugs. This drug, at one time the most prescribes drug in the country, has a single ionization center, with pKa reported as 3.4. a. Draw the structure of diazepam. b. Is this drug acidic, basic, or neutral? c. What would be an optimum pH for extracting diazepam? A case sample from a suspected arson fire is submitted to the lab. The fire was suppressed with large volumes of water. The exhibit submitted to the lab consists of ~50 mLs of this water. The water appears dirty and has suspended solids and other visible debris. Propose a SPE method to clean the sample and isolate any residual accelerants assuming gasoline or another hydrocarbon was used.
Comment on the relative solubilities of the following compounds: Silver bromate, Ksp = 5.5 times 10^Silver sulfide, ksp = 6 times 10^51 Magnesium carbonate, 3.5 times 10^Manganese hydroxide, ksp = 1.6 times 10^-13 Quinine is a diabasic molecule with pKa's 4.1 and 8.5. It is encountered as a diluent for heroin. To extract quinine from as aqueous solution, what pH should be used and why? Diazepam (Valium) is a member of the benzodiazepine family drugs. This drug, at one time the most prescribes drug in the country, has a single ionization center, with pKa reported as 3.4. a. Draw the structure of diazepam. b. Is this drug acidic, basic, or neutral? c. What would be an optimum pH for extracting diazepam? A case sample from a suspected arson fire is submitted to the lab. The fire was suppressed with large volumes of water. The exhibit submitted to the lab consists of ~50 mLs of this water. The water appears dirty and has suspended solids and other visible debris. Propose a SPE method to clean the sample and isolate any residual accelerants assuming gasoline or another hydrocarbon was used.
Elin HesselLv2
13 Jul 2019