are &c. = = 5-18. Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol 36,400 and &Ni = 5520 at 510 nm and &c. = 1240 and EN 17,500 at 656 nm. A 0.425-g sample was dissolved and diluted to 50.0 mL. A 25.0-mL aliquot was treated to eliminate interferences; after addition of 2,3-quinoxalinedithiol, the volume was adjusted to 50.0 mL. This solution had an absorbance of 0.446 at 510 nm and 0.326 at 656 nm in a 1.00-cm cell. Cal- culate the concentration in parts per million of cobalt and nickel in the sample. 26

are &c. = = 5-18. Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol 36,400 and &Ni = 5520 at 510 nm and &c. = 1240 and EN 17,500 at 656 nm. A 0.425-g sample was dissolved and diluted to 50.0 mL. A 25.0-mL aliquot was treated to eliminate interferences; after addition of 2,3-quinoxalinedithiol, the volume was adjusted to 50.0 mL. This solution had an absorbance of 0.446 at 510 nm and 0.326 at 656 nm in a 1.00-cm cell. Cal- culate the concentration in parts per million of cobalt and nickel in the sample. 26

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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