During an assay of paracetamol by UV an analyst prepares a series of calibration solutions containing approximately 3-15 mcg/mL paracetamol as follows: • 135.4 mg of pure paracetamol was added to a 200 mL volumetric flask. • 0.1 M NAOH (50 mL) was added, the mixture well shaken and made up to volume with deionized water • 10 mL of the above solution was diluted to 100 mL a) What is the concentration of the final diluted solution in mcg/mL? Answer = mcg/mL (1 decimal) b) What volume of the diluted solution is required to prepare 100 mL of a 5 mcg/mL standard solution? Answer = mL (1 decimal)

During an assay of paracetamol by UV an analyst prepares a series of calibration solutions containing approximately 3-15 mcg/mL paracetamol as follows: • 135.4 mg of pure paracetamol was added to a 200 mL volumetric flask. • 0.1 M NAOH (50 mL) was added, the mixture well shaken and made up to volume with deionized water • 10 mL of the above solution was diluted to 100 mL a) What is the concentration of the final diluted solution in mcg/mL? Answer = mcg/mL (1 decimal) b) What volume of the diluted solution is required to prepare 100 mL of a 5 mcg/mL standard solution? Answer = mL (1 decimal)

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 1Q

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Hexanoic acid was added to an immiscible biphasic solvent sysem, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D1) of hexanoic acid in CCl4 with respect to water.
During an assay of paracetamol by UV an analyst prepares a series of calibration solutions containing approximately 3-15 mcg/mL paracetamol as follows: 140.1 mg of pure paracetamol was added to a 200 mL volumetric flask. 0.1 M NaOH (50 mL) was added, the mixture well shaken and made up to volume with deionized water 10 mL of the above solution was diluted to 100 mL 1)What is the concentration of the final diluted solution in mcg/mL?(1 decimal) 2) What volume of the diluted solution is required to prepare 100 mL of a 8 mcg/mL standard solution? (1 decimal)
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