A sample of steel (0.1005 g) was dissolved in acid and the solution made up to 100 cm³ with demineralised water. From this solution, 10.0 cm³ aliquots, to which were added 0.0, 10.0, 20.0, 30.0, and 40.0 cm³ of a 2.50 mg L-1 Cr solution and the flasks made up to 100.0 cm³ with distilled water. Use the absorbance values obtained below for these solutions to determine the chromium content of the sample of steel, expressing the result as a weight percentage (% w/w). 3 Sample solution (10.0 cm³) + 0.0 cm³ standard Sample solution (10.0 cm³) + 10.0 cm³ standard Sample solution (10.0 cm³) + 20.0 cm³ standard Sample solution (10.0 cm³) + 30.0 cm³ standard Sample solution (10.0 cm³) + 40.0 cm³ standard Absorbance 0.201 0.292 0.378 0.467 0.554
A sample of steel (0.1005 g) was dissolved in acid and the solution made up to 100 cm³ with demineralised water. From this solution, 10.0 cm³ aliquots, to which were added 0.0, 10.0, 20.0, 30.0, and 40.0 cm³ of a 2.50 mg L-1 Cr solution and the flasks made up to 100.0 cm³ with distilled water. Use the absorbance values obtained below for these solutions to determine the chromium content of the sample of steel, expressing the result as a weight percentage (% w/w). 3 Sample solution (10.0 cm³) + 0.0 cm³ standard Sample solution (10.0 cm³) + 10.0 cm³ standard Sample solution (10.0 cm³) + 20.0 cm³ standard Sample solution (10.0 cm³) + 30.0 cm³ standard Sample solution (10.0 cm³) + 40.0 cm³ standard Absorbance 0.201 0.292 0.378 0.467 0.554
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:A sample of steel (0.1005 g) was dissolved in acid and the solution made up to
100 cm³ with demineralised water. From this solution, 10.0 cm³ aliquots, to which
were added 0.0, 10.0, 20.0, 30.0, and 40.0 cm³ of a 2.50 mg L-1 Cr solution and the
flasks made up to 100.0 cm³ with distilled water. Use the absorbance values
obtained below for these solutions to determine the chromium content of the sample
of steel, expressing the result as a weight percentage (% w/w).
3
Sample solution (10.0 cm³) + 0.0 cm³ standard
Sample solution (10.0 cm³) + 10.0 cm³ standard
Sample solution (10.0 cm³) + 20.0 cm³ standard
Sample solution (10.0 cm³) + 30.0 cm³ standard
Sample solution (10.0 cm³) + 40.0 cm³ standard
Absorbance
0.201
0.292
0.378
0.467
0.554
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