method as follows: punty of an ibuprofen sample was determined by a reversed phase HPLC Y A calibration curve of peak area versus concentration (ug/mL) of pure ibuprofen was constructed The ibuprofen şample for analysis was prepared by taking 10.0204 g of powder and dissolving it in/1Lbf distilled water (solution A). 1 ml of the latter solution was further diluted to IL with distilled water (solution B). Solution B was analysed by HPLC analysis Results The equation for the best-fit line of the calibration curve is: y=26820x-1323.8. The average peak area for the ibuprofen sample (solution B) was 266796.2 Calculate the percentage purity of the ibuprofen powder,

method as follows: punty of an ibuprofen sample was determined by a reversed phase HPLC Y A calibration curve of peak area versus concentration (ug/mL) of pure ibuprofen was constructed The ibuprofen şample for analysis was prepared by taking 10.0204 g of powder and dissolving it in/1Lbf distilled water (solution A). 1 ml of the latter solution was further diluted to IL with distilled water (solution B). Solution B was analysed by HPLC analysis Results The equation for the best-fit line of the calibration curve is: y=26820x-1323.8. The average peak area for the ibuprofen sample (solution B) was 266796.2 Calculate the percentage purity of the ibuprofen powder,

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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A 50 mL sample solution containing 8-hydroxyquinoline (MW: 145) was analyzed by adding 25 ml, 0.1 M KBrO3, excess KBr and acidified. The mixture was left for 10 minutes in dark place. After this time KI in excess was added followed by titration with 27.9 mL, 0.05 M thiosulfate standard solution. Write balance equations? What is the percent w/v 8-hydroxyquinoline in sample?
49 3. In a preliminary experiment, a solution containing 0.083M X and 0.0666M S gave peak areas of A, = 423 and As = 347. In the analysis of an unknown sample, 10.0 ml of 0.146M S was added to 10,0 ml. of the unknown and the mixture was diluted to 25 ml. in a volumetric flask. Axin the mixture was 553 and As was 582. What is the concentration of X in the unknown?
A Sodium Chloride (0.1920g) NaCI was assayed using volhard Method, using 52mL of 0.0975N AGNO3 and 12.3 mL of 0.1192Ammonium thioscyanate. Calculate the sample in %.
Calculate the water hardness (mg L-1 of CaCO3) (i.e. calculate the mass of CaCO3) please show working out. thank you :) Sample No. 1 2 3 4 Final Burette reading (mL) 24.40 46.90 24.70 47.20 Initial Burette reading (mL) 0.10 24.40 2.10 24.70 Final-Initial Titre (mL) 24.30 22.50 22.60 22.50
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