Please answer in detailed solution. The copper in an aqueous sample was determined by atomic absorption flame spectrometry. First, 10.0ml of the unknown were pipetted into each of five 50.0-ml volumetric flasks. Various volumes of astandard containing 12.2 ppm Cu were added to the flasks, and the solutions were then diluted tovolume.Unknown (mL)Standard (mL)Absorbance10.00.00.20110.010.00.29210.020.00.37810.030.00.46710.040.00.554A. Plot absorbance as a function of the concentration of Cu standard after final dilution anddetermine the equation of the line and determine the x-intercept. Calculate the copperconcentration in ppm Cu in the aqueous sample.

Answered: Image /qna-images/answer/68630323-cc23-41bd-b0c4-6cf95ec77d3d.jpg

nL of the unknown were pipetted into each of five 50.0-ml volumetric flasks. Various volumes of a tandard containing 12.2 ppm Cu were added to the flasks, and the solutions were then diluted to olume. Unknown (mL) L0.0 Standard (mL) Absorbance 0.0 0.201 L0.0 10.0 0.292 0.0 20.0 0.378 0.0 30.0 0.467 L0.0 40.0 0.554 A. Plot absorbance as a function of the concentration of Cu standard after final dilution and determine the equation of the line and determine the x-intercept. Calculate the copper concentration in ppm Cu in the aqueous sample.

nL of the unknown were pipetted into each of five 50.0-ml volumetric flasks. Various volumes of a tandard containing 12.2 ppm Cu were added to the flasks, and the solutions were then diluted to olume. Unknown (mL) L0.0 Standard (mL) Absorbance 0.0 0.201 L0.0 10.0 0.292 0.0 20.0 0.378 0.0 30.0 0.467 L0.0 40.0 0.554 A. Plot absorbance as a function of the concentration of Cu standard after final dilution and determine the equation of the line and determine the x-intercept. Calculate the copper concentration in ppm Cu in the aqueous sample.

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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Question

Please answer in detailed solution.

The copper in an aqueous sample was determined by atomic absorption flame spectrometry. First, 10.0
ml of the unknown were 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.
Unknown (mL)
Standard (mL)
Absorbance
10.0
0.0
0.201
10.0
10.0
0.292
10.0
20.0
0.378
10.0
30.0
0.467
10.0
40.0
0.554
A. Plot absorbance as a function of the concentration of Cu standard after final dilution and
determine the equation of the line and determine the x-intercept. Calculate the copper
concentration in ppm Cu in the aqueous sample.

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