Mn was used as an internal standard for measuring Fe by atomic absorption. A standard mixture containing 2.00 mg Mn/ml and 2.50 mg Fe/ml gave a quotient (Fe signal/Mn signal) = 1.05/1.00. A mixture with a volume of 6.00 mL was prepared by mixing 5.00 ml of unknown Fe solution with 1.00 mL containing 13.5 mg Mn/ml. The absorbance of this mixture at the Mn wavelength was 0.128, and the absorbance at the Fe wavelength was 0.185. Find the molarity of the %3D unknown solution.
Mn was used as an internal standard for measuring Fe by atomic absorption. A standard mixture containing 2.00 mg Mn/ml and 2.50 mg Fe/ml gave a quotient (Fe signal/Mn signal) = 1.05/1.00. A mixture with a volume of 6.00 mL was prepared by mixing 5.00 ml of unknown Fe solution with 1.00 mL containing 13.5 mg Mn/ml. The absorbance of this mixture at the Mn wavelength was 0.128, and the absorbance at the Fe wavelength was 0.185. Find the molarity of the %3D unknown solution.
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter13: An Introduction To Ultraviolet-visible Molecular Absorption Spectrometry
Section: Chapter Questions
Problem 13.14QAP
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Transcribed Image Text:Mn was used as an internal standard for measuring Fe by atomic absorption. A standard mixture containing 2.00 mg
Mn/ml and 2.50 mg Fe/ml gave a quotient (Fe signal/Mn signal) = 1.05/1.00. A mixture with a volume of 6.00 mL was
%3D
prepared by mixing 5.00 ml of unknown Fe solution with 1.00 mL containing 13.5 mg Mn/ml. The absorbance of this
mixture at the Mn wavelength was 0.128, and the absorbance at the Fe wavelength was 0.185. Find the molarity of the
unknown solution.
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