Question 1 Analysis of cadmium in the water sample was determine by AAS with multiple concentration standard addition method. Five flasks were prepared for the analysis, each flask contains 20 ml of unknown water sample. Volumes of 10, 15, 20, and 25 ml of standard (200 pg/mL) were added to flasks 2 to 5. The volume of all flasks was brought to a final volume of 100 mL. Determine the concentration of hexavalent chromium present in the water sample. Flasks Vol of unknown Vol of std Vol of water added Total volume Concentration Absorbance 2 4 5 2.90 4.29 6.19 7.40 9.08 Using the given data, determine the following information: What is the concentration of standard in FLASK 4? O 40 ug/ml O 30 ug/ml O 20 ugiml O 10 ug/ml

Question 1 Analysis of cadmium in the water sample was determine by AAS with multiple concentration standard addition method. Five flasks were prepared for the analysis, each flask contains 20 ml of unknown water sample. Volumes of 10, 15, 20, and 25 ml of standard (200 pg/mL) were added to flasks 2 to 5. The volume of all flasks was brought to a final volume of 100 mL. Determine the concentration of hexavalent chromium present in the water sample. Flasks Vol of unknown Vol of std Vol of water added Total volume Concentration Absorbance 2 4 5 2.90 4.29 6.19 7.40 9.08 Using the given data, determine the following information: What is the concentration of standard in FLASK 4? O 40 ug/ml O 30 ug/ml O 20 ugiml O 10 ug/ml

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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