A 0.1860 g rock sample containing an unknown amount of Ca was dissolved in HCI and diluted to 100.0 mL. Aliquots of 5.00 mL from this solution were added to different volumes of a 2.08 µg/ml. Ca standard solution and diluted to 200.0 mL. The emission intensity of these solutions was measured using atomic emission spectroscopy. The results are shown in the table. Unknown volume (mL) Standard volume (mL) Final volume (mL) Emission Intensity 200.0 200.0 200.0 200.0 200.0 5.00 227.0 5.00 413.0 5.00 637.0 5.00 831.0 5.00 1021.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. weight percent: 8.27 x10-5 Incorrect 0.00 5.00 10.00 15.00 20.00 % Ca .03 Incorrect
A 0.1860 g rock sample containing an unknown amount of Ca was dissolved in HCI and diluted to 100.0 mL. Aliquots of 5.00 mL from this solution were added to different volumes of a 2.08 µg/ml. Ca standard solution and diluted to 200.0 mL. The emission intensity of these solutions was measured using atomic emission spectroscopy. The results are shown in the table. Unknown volume (mL) Standard volume (mL) Final volume (mL) Emission Intensity 200.0 200.0 200.0 200.0 200.0 5.00 227.0 5.00 413.0 5.00 637.0 5.00 831.0 5.00 1021.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. weight percent: 8.27 x10-5 Incorrect 0.00 5.00 10.00 15.00 20.00 % Ca .03 Incorrect
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
Chapter10: Atomic Emission Spectrometry
Section: Chapter Questions
Problem 10.11QAP
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