A 0,0138 gram sample of brass was dissolved in a approximately 1 ml of nitric acid and then diluted to 250.0 ml using a volumetric flask. The 20% dilution of the unknown gave an average absorbance of 0.3514 at 213.9 nm. A zinc calibration curve is shown below. Calculate the percentage of zinc in the brass sample. Show your work in the space below. Zn Calibration Curve 12 y-0.8339+ 0.0452 R-099788 08 06 Concentration (ppm) Absorbance e 213.9 nm

A 0,0138 gram sample of brass was dissolved in a approximately 1 ml of nitric acid and then diluted to 250.0 ml using a volumetric flask. The 20% dilution of the unknown gave an average absorbance of 0.3514 at 213.9 nm. A zinc calibration curve is shown below. Calculate the percentage of zinc in the brass sample. Show your work in the space below. Zn Calibration Curve 12 y-0.8339+ 0.0452 R-099788 08 06 Concentration (ppm) Absorbance e 213.9 nm

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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