A standard solution was put through appropriate dilutions to give the concentrations of iron shown in the table that follows. The iron(II)-1,10-phenanthroline complex was then formed in 25.0-mL aliquots of these solutions, following which each was diluted to 50.0 mL. The following absorbances (1.00-cm cells) were recorded at 510 nm:

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
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Chapter24: Introduction To Spectrochemical Methods
Section: Chapter Questions
Problem 24.20QAP
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A standard solution was put through appropriate dilutions to give the concentrations of iron shown in the table that follows. The iron(II)-1,10-phenanthroline complex was then formed in 25.0-mL aliquots of these solutions, following which each was diluted to 50.0 mL. The following absorbances (1.00-cm cells) were recorded at 510 nm:

  • Calculate the concentration, in ppm, of a sample with an abosrbance of 0.829.
Fe(II) concentration (ppm) A510
4.00 0.160
10.0 0.390
16.0 0.630
24.0 0.950
32.0 1.260
40.0 1.580
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