B. The copper concentration in a contaminated salt sample was determined by flame atomic absorption spectrometry. In the analysis, a 10.00-g sample containing an analyte is transferred to a 250-mL 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 40.0 Absorbance 0.201 0.292 0.378 0.467 0.554 What type of standardization (calibration) technique is used in this problem? What do you think is the main reason why this standardization technique is used?

B. The copper concentration in a contaminated salt sample was determined by flame atomic absorption spectrometry. In the analysis, a 10.00-g sample containing an analyte is transferred to a 250-mL 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 40.0 Absorbance 0.201 0.292 0.378 0.467 0.554 What type of standardization (calibration) technique is used in this problem? What do you think is the main reason why this standardization technique is used?

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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Concept explainers

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

B. The copper concentration in a contaminated salt sample was determined by flame atomic absorption
spectrometry. In the analysis, a 10.00-g sample containing an analyte is transferred to a 250-mL
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
40.0
Absorbance
0.201
0.292
0.378
0.467
0.554
What type of standardization (calibration) technique is used in this problem? What do you think is the
main reason why this standardization technique is used?

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