Fe* is used as a catalyst for the oxidation of luminal by H,02. The resulting chemiluminescence increases linearly with Fet concentration. Exactly 1.0 mL of water was added to a 5.0-mL sample of an unknown Fe2* solution, followed by 2.0 mL of H20, and 1.0 mL of luminol. The chemiluminescence intensity was found to be 16.1. When 1.0 mL of 4.75 x 10 5M Fe2+ solution was added to another 5.0-mL of the unknown Fe2+ solution, followed by 2.0 mL of H202 and 1.0 mL of luminol, the chemiluminescence intensity was 39.6. Calculate the concentration of iron ions in the sample. 6.5 x 106 M 9.0 x 10 5 M O 1.4x 10 5 M 1.3 x 104 M 1.6 x 104 M

Fe* is used as a catalyst for the oxidation of luminal by H,02. The resulting chemiluminescence increases linearly with Fet concentration. Exactly 1.0 mL of water was added to a 5.0-mL sample of an unknown Fe2* solution, followed by 2.0 mL of H20, and 1.0 mL of luminol. The chemiluminescence intensity was found to be 16.1. When 1.0 mL of 4.75 x 10 5M Fe2+ solution was added to another 5.0-mL of the unknown Fe2+ solution, followed by 2.0 mL of H202 and 1.0 mL of luminol, the chemiluminescence intensity was 39.6. Calculate the concentration of iron ions in the sample. 6.5 x 106 M 9.0 x 10 5 M O 1.4x 10 5 M 1.3 x 104 M 1.6 x 104 M

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 6P

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