A 0.3600 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 5.00 0.00 200.0 5.00 5.00 200.0 5.00 10.00 200.0 5.00 15.00 200.0 5.00 20.00 200.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. 212.0 398.0 622.0 816.0 1006.0
A 0.3600 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 5.00 0.00 200.0 5.00 5.00 200.0 5.00 10.00 200.0 5.00 15.00 200.0 5.00 20.00 200.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. 212.0 398.0 622.0 816.0 1006.0
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A 0.3600 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
0.00
212.0
5.00
5.00
398.0
5.00
10.00
622.0
5.00
15.00
816.0
5.00
20.00
1006.0
Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions.
weight percent:
% Ca
I+
Cr
20
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