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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Transcribed Image Text:Gold can be determined in solutions containing high concentrations of diverse ions by ICP-AES. Aliquots of
50.0 mL of the sample solution were transferred to each of four 100.0 mL volumetric flasks. A solution was
prepared containing 10.0 mg/L Au in 20% H2SO4 and quantities of this solution were added to the sample
solutions to give 0, 2.5, 5, and 10 mg/L added Au in each of the flasks. The solutions were made up to a total
volume of 100.0 mL, mixed, and analysed by ICP-AES. The resulting data are presented in the following table.
Added Au, mg/L
Emission Intensity Count
12,568
19,324
26,622
40,021
0.0
2.5
5.0
10.0
Calculate the concentration of gold in the original sample.
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