The copper in a contaminated water sample was determined by atomic absorption flame spectroscopy. First 10.0 mL of the unknown was pipetted into each of five 50.0 mL volumetric flasks. Various volumes of a standard stock solution containing 12.2 ppm Cu were added to the flasks, and the solutions were then diluted to volume. Volume of Unknown/mL Volume of Standard / mL [Cu ]/ppm Absorbance 10 0 0.201 10 10 0.292 10 20 0.378 10 30 0.467 10 40 0.554 a) Determine the Cu concentration in each solution from the standard in ppm. b) Plot absorbance as a function of the Cu concentration on a plot (which is included) using spreadsheet software and include appropriate axis labels. c) Determine values for the slope and intercept from the line of best fit to the data. d) Determine the concentration of Cu in the original water sample. hi

The copper in a contaminated water sample was determined by atomic absorption flame spectroscopy. First 10.0 mL of the unknown was pipetted into each of five 50.0 mL volumetric flasks. Various volumes of a standard stock solution containing 12.2 ppm Cu were added to the flasks, and the solutions were then diluted to volume. Volume of Unknown/mL Volume of Standard / mL [Cu ]/ppm Absorbance 10 0 0.201 10 10 0.292 10 20 0.378 10 30 0.467 10 40 0.554 a) Determine the Cu concentration in each solution from the standard in ppm. b) Plot absorbance as a function of the Cu concentration on a plot (which is included) using spreadsheet software and include appropriate axis labels. c) Determine values for the slope and intercept from the line of best fit to the data. d) Determine the concentration of Cu in the original water sample. hi

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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