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The lead level in a sample of contaminated soil was determined using AAS. A 2.0 g sample was dissolved in acid and then diluted to a total volume of 50.0 mL. The absorbance of this solution, determined in a spectrometer at a wavelength of 218 nm, was found to be 0.20. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. 0.8 + 0.7 0.6 0.5 0.4 0.3 0.2 0.1 5.0 10.0 concentration of Pb (mg L-') Calculate: i. the sensitivity of method. ii. the concentration of lead in the soil in mg/kg. absorbance

The lead level in a sample of contaminated soil was determined using AAS. A 2.0 g sample was dissolved in acid and then diluted to a total volume of 50.0 mL. The absorbance of this solution, determined in a spectrometer at a wavelength of 218 nm, was found to be 0.20. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. 0.8 + 0.7 0.6 0.5 0.4 0.3 0.2 0.1 5.0 10.0 concentration of Pb (mg L-') Calculate: i. the sensitivity of method. ii. the concentration of lead in the soil in mg/kg. absorbance

Chemistry
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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The lead level in a sample of contaminated soil was determined using AAS. A 2.0 g sample was dissolved in acid and then diluted to a total volume of 50.0 mL. The absorbance of this solution, determined in a spectrometer at a wavelength of 218 nm, was found to be 0.20. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. 0.8 + 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 + 5.0 10.0 concentration of Pb (mg L-1) Calculate: i. the sensitivity of method. ii. the concentration of lead in the soil in mg/kg. absorbance
Transcribed Image Text:The lead level in a sample of contaminated soil was determined using AAS. A 2.0 g sample was dissolved in acid and then diluted to a total volume of 50.0 mL. The absorbance of this solution, determined in a spectrometer at a wavelength of 218 nm, was found to be 0.20. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. 0.8 + 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 + 5.0 10.0 concentration of Pb (mg L-1) Calculate: i. the sensitivity of method. ii. the concentration of lead in the soil in mg/kg. absorbance
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