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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 408 Weeks Ago, 3 Days Ago |
| Questions Answered: | 66690 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
The concentrations of Fe3+ and Cu2+ in a mixture can be determined following their reaction with hexacyanoruthenate (II), Ru(CN)64–, which forms a purple blue complex with Fe3+ (l? max = 550 nm), and a pale green complex with Cu2+ ( ? max = 396 nm). The molar absorptivities (M–1 cm–1) for the metal complexes at the two wavelengths are summarized in the following table.
e550 e396
Fe3+ 9970 84
Cu2+ 34 856
When a sample containing Fe3+ and Cu2+ is analyzed in a cell with a path length of 1.00 cm, the absorbance at 550 nm is 0.183, and the absorbance at 396 nm is 0.109. What are the molar concentrations of Fe3+ and Cu2+ in the sample?
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