Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 80AP
Related questions
Question
![B. The copper concentration in a contaminated salt sample was
spectrometry. In the analysis, a 10.00-g sample containing an ar
volumetric flask and diluted to volume.
A series of 10.0 mL of the diluted sample solution was pipetted into each of five 50.0-mL volumetric
flasks. Various volumes of a standard containing 12.2 ppm Cu were added to the flasks, and the
solutions were then diluted to volume. The corresponding absorbances of each of the solutions are
given below:
Unknown, mL
10.0
10.0
10.0
10.0
10.0
Standard, mL
0.0
10.0
20.0
30.0
ined by flame atomic absorption
is transferred to a 250-ml
40.0
Absorbance
0.201
0.292
0.378
0.467
0.554
Calculate the copper concentration (a) in the diluted sample solution expressed in ppm Cu, and (b) in
the salt sample as percent copper (%Cu).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2a74fb36-dfac-422e-a40d-04ac733f8fc9%2Fe7fc8bfd-fd57-44b7-af9c-27627c516513%2Fqqn8ehh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:B. The copper concentration in a contaminated salt sample was
spectrometry. In the analysis, a 10.00-g sample containing an ar
volumetric flask and diluted to volume.
A series of 10.0 mL of the diluted sample solution was pipetted into each of five 50.0-mL volumetric
flasks. Various volumes of a standard containing 12.2 ppm Cu were added to the flasks, and the
solutions were then diluted to volume. The corresponding absorbances of each of the solutions are
given below:
Unknown, mL
10.0
10.0
10.0
10.0
10.0
Standard, mL
0.0
10.0
20.0
30.0
ined by flame atomic absorption
is transferred to a 250-ml
40.0
Absorbance
0.201
0.292
0.378
0.467
0.554
Calculate the copper concentration (a) in the diluted sample solution expressed in ppm Cu, and (b) in
the salt sample as percent copper (%Cu).
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