A sample of cobalt is to be determined using absorption spectrum analysis. A 0.286 g sample of a cobalt ore is crushed and digested in 1M HNO3. The stock solution is then diluted to 250.0 mL in a volumetric flask (assuming the solution has a density = 1.00 g/mL). The analysis then proceeds as follows: Sample Solution Std Co solution (11.2 ppm) Final Volume Transmittance 15.0 mL 0.00 mL 100.0 mL 54.1% 15.0 mL 5.00 mL 100.0 mL 19.9% Calculate the percent cobalt in the original ore sample.
A sample of cobalt is to be determined using absorption spectrum analysis. A 0.286 g sample of a cobalt ore is crushed and digested in 1M HNO3. The stock solution is then diluted to 250.0 mL in a volumetric flask (assuming the solution has a density = 1.00 g/mL). The analysis then proceeds as follows: Sample Solution Std Co solution (11.2 ppm) Final Volume Transmittance 15.0 mL 0.00 mL 100.0 mL 54.1% 15.0 mL 5.00 mL 100.0 mL 19.9% Calculate the percent cobalt in the original ore sample.
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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. A sample of cobalt is to be determined using absorption spectrum analysis. A 0.286 g sample
of a cobalt ore is crushed and digested in 1M HNO3. The stock solution is then diluted to 250.0
mL in a volumetric flask (assuming the solution has a density = 1.00 g/mL). The analysis then
proceeds as follows: Sample Solution Std Co solution (11.2 ppm) Final Volume Transmittance
15.0 mL 0.00 mL 100.0 mL 54.1%
15.0 mL 5.00 mL 100.0 mL 19.9%
Calculate the percent cobalt in the original ore sample.
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