10 grams of compound A is dissolved in 50ml water Methanol will be used to extract A form water knowing that the distribution coefficient of compound A between methanol and water is 8 how much of A will be in Methanol if it was extracted from water with three sequential extractions using 30 mL of methanol each time and then combine the methanol extracts Select one O 0051 0 1 95 O 8 03 O 995

10 grams of compound A is dissolved in 50ml water Methanol will be used to extract A form water knowing that the distribution coefficient of compound A between methanol and water is 8 how much of A will be in Methanol if it was extracted from water with three sequential extractions using 30 mL of methanol each time and then combine the methanol extracts Select one O 0051 0 1 95 O 8 03 O 995

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter88: Column Chromatography

Section: Chapter Questions

Problem 5P

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Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?
From a 10-mL sample, a 1-mL aliquot was taken and diluted to 100mL. From this, a 5-mL aliquot was taken and diluted to 20mL.The final 20mL was found to have a concentration of 0.004M analyte X.What is the concentration of analyte X in the 10-mL sample?
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Suppose you are interested to extract most of the 5 grams of vitamin C dissolved in 100 mL of water using dichloromethane. The distribution coefficient for vitamin C between dichloromethane and water is 10. (KD vitamin C (CH2Cl2/H2O) = 10) (a) How much of vitamin C will be extracted in the CH2Cl2 if you extract it from water one time with 75 mL of CH2Cl2? (b)How much of vitamin C will be extracted in the CH2Cl2 if you extract it from water three times with 25 mL of CH2Cl2? (Show computation)
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(c) What is the minimum distribution ratio that permits removal of 99% of a solute from 50.0 mL of water with (i) two 20.0-mL extractions with an organic solvent; (ii) four 10.0-mL extractions with the organic solvent?
2. You need to make 500mL of 7H9(+) media with 1X ADN and 30ug/ml. of the antibiotic kanamycin. Your stock solutions are 10X ADN and 30mg/mL of kanamycin. The solvent is distilled water. How much of cach component will you need to make the desired final solution?