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- 17. Is caffeine an addictive substance? If so, is it psychologically addictive, physiologically addictive, or both? What about chocolate? Bubble gum? How are such distinctions made? A common scene in movies and TV programs shows the detective tasting a suspected drug powder to determine its identity. In addition to being poor laboratory practice, it is a really bad idea. Discuss and explain. 18.) In Chapter 8 (The Water Soluble Vitamins), section 8.1 (What are Vitamins) discusses Absorption, Storage and Excretion of Vitamins, both water- and fat-soluble. How readily a vitamin can be absorbed and utilized by the body is called its bioavailability. Fat-soluble vitamins require _fat__in the diet for absorption while water soluble vitamins, which include all B vitamins and vitamin ______, dissolve in water and depend on energy-requiring transport systems or need to be bound to specific molecules in the GI tract in order to be absorbed in the small intestine. Once absorbed into the blood, vitamins must be transported to the cells, mostly by being bound to _________________________ for transport. Fat soluble vitamins, which include vitamins ______, ________, _________ and _______ are incorporated into ___________________ for transport from the intestine. With the exception of vitamin B12, the water-soluble vitamins are easily excreted from the body in the urine. In contrast,…23. A researcher wanted to use myoglobin as a substitute for hemoglobin to carry oxygen in a human body. Would this be successful? Why or why not? Use the graph below to help you answer your question. Fractional Saturation D.B 0.6 0.4 0.2 Mb 20 40 Hb 60 po, (tor) 80 100 3
- Materials Needed solid I2 solid CUSO4-5H20 food dye solid (NH4)2SO4 heavy metals waste container halogenated waste container non-halogenated waste container semi-micro test tubes and rack regular test tubes and rack squash pipettes acetone cyclohexane propan-2-ol Method Part A: Solubility of ionic and molecular solids 1. Place a small amount (about the size of 1 grain of rice, see picture) of copper sulfate into each of three DRY semi-micro test tubes. Add 20 drops of water to the first test tube and gently flick the test tube with your finger to ensure mixing. 2. Repeat step 1 using acetone in place of water as the solvent in the second test tube. 3. Repeat step 2 replacing acetone with cyclohexane in the third test tube. Hold the test tubes against a white background to compare the solubility of copper sulfate in the three solvents and record your results. Discard these mixtures into the heavy metals waste container in the fume cupboard. Once these test tubes have been emptied you…1 What mass of solid radium sulfate (the most insoluble compound known) will remain when 10 L of a saturated solution is transferred to a new container and the water evaporated to complete dryness? Ksp for RaSO4 = 4.30 x 10–11. a. 0.0021 g b. 0.021 g c. 0.071 g d. 0.710 g e. 0.0070 gWhich one of the compounds below has the highest solubility in water, expressed in moles per liter? a. ZnCO3, Ksp = 1.4 × 10–11 b. Cd(OH)2, Ksp = 2.4 × 10–14 c. AgI, Ksp = 8.3 × 10–17 d. CdCO3, Ksp = 5.2 × 10–12
- Explain the solubility behavior of the compounds in water with relevance to their structure. a. Acyl compounds in waterb. Amines in waterc. Amino Acids and Proteins in waterPeptides Proteins Amino Acids How do amino acids exist in solution? What is the solubility in organic solvents, aqueous acids, aqueous bases?Is butanedioic acid soluble in water? HCl? NaOH? NaHCO3?
- Which statement is true about the water solubility of KCl, AgCl, and NH4Cl. Question 34 options: Only KCl and AgCl are soluble. Only AgCl and and NH4Cl are soluble. All of these compounds are insoluble. Only KCl and NH4Cl are soluble. All of these ionic compounds are soluble.How many milliliters of a 17% w/v concentrate of benzalkonium chloride should be used in preparing 150 mL of a stock solution such that 15 mL. diluted to 1 liter will yield a 1:5000 solution? A. 2 ml. B. 23.5 mL C. 11.75 ml. D. 0.2 mLCalculate the molar concentration of a blood sugar level of 100 mg /dl where MW glucose = 180