A 5.12-g pesticide sample was decomposed and then dilute to 200-mL to determine its Cu2* contents. The analysis was completed by treating aliquots as indicated: Volume of sample, mL Volume of 3.82 ppm Cu²*, mL Signal 50.0 0.00 0.512 50.0 4.00 0.844 a. Calculate the percentage of copper in the pesticide sample.

Fundamentals Of Analytical Chemistry
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ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter27: Molecular Fluorescence Spectroscopy
Section: Chapter Questions
Problem 27.11QAP
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A 5.12-g pesticide sample was decomposed and then dilute to 200-mL to determine its Cu2* contents. The analysis was
completed by treating aliquots as indicated:
Volume of sample, mL
Volume of 3.82 ppm Cu²*, mL Signal
50.0
0.00
0.512
50.0
4.00
0.844
a. Calculate the percentage of copper in the pesticide sample.
b. What assumption did you make in calculating the concentration of copper in your sample?
Transcribed Image Text:A 5.12-g pesticide sample was decomposed and then dilute to 200-mL to determine its Cu2* contents. The analysis was completed by treating aliquots as indicated: Volume of sample, mL Volume of 3.82 ppm Cu²*, mL Signal 50.0 0.00 0.512 50.0 4.00 0.844 a. Calculate the percentage of copper in the pesticide sample. b. What assumption did you make in calculating the concentration of copper in your sample?
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