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Atomic emission spectroscopy and the method of standard addition are used to determine the Na+ concentration and its uncertainty in an unknown sample. Increasing amounts of a 1.75 µg/mL standard Na+ solution are added to a series of volumetric flasks containing 15.00 mL of the unknown solution. The volumetric flasks are then diluted to a final volume of 200.0 mL. Atomic emission spectroscopy is then used to measure the emission intensity of each solution. Unknown volume Standard volume Final volume (mL) 200.0 200.0 200.0 200.0 200.0 (mL) 15.00 15.00 15.00 15.00 15.00 concentration: Based on the data in the table, determine the original concentration of Na+ and its uncertainty in the unknown sample. Report the uncertainty with three significant figures. + +1 1.3 0.098 Incorrect 0.056 (mL) 0.00 5.00 10.00 15.00 20.00 Please help solve for uncertainty. Show work to arrive at final answer. incorrect answers shown below: Incorrect 0.182 Emission intensity 343.0 486.0 634.0 799.0 940.0 µg/mL 0.307 Incorrect µg/mL µg/mL μg/mL µg/mL

Atomic emission spectroscopy and the method of standard addition are used to determine the Na+ concentration and its uncertainty in an unknown sample. Increasing amounts of a 1.75 µg/mL standard Na+ solution are added to a series of volumetric flasks containing 15.00 mL of the unknown solution. The volumetric flasks are then diluted to a final volume of 200.0 mL. Atomic emission spectroscopy is then used to measure the emission intensity of each solution. Unknown volume Standard volume Final volume (mL) 200.0 200.0 200.0 200.0 200.0 (mL) 15.00 15.00 15.00 15.00 15.00 concentration: Based on the data in the table, determine the original concentration of Na+ and its uncertainty in the unknown sample. Report the uncertainty with three significant figures. + +1 1.3 0.098 Incorrect 0.056 (mL) 0.00 5.00 10.00 15.00 20.00 Please help solve for uncertainty. Show work to arrive at final answer. incorrect answers shown below: Incorrect 0.182 Emission intensity 343.0 486.0 634.0 799.0 940.0 µg/mL 0.307 Incorrect µg/mL µg/mL μg/mL µg/mL

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Atomic emission spectroscopy and the method of standard addition are used to determine the Na+ concentration and its uncertainty in an unknown sample. Increasing amounts of a 1.75 µg/mL standard Na+ solution are added to a series of volumetric flasks containing 15.00 mL of the unknown solution. The volumetric flasks are then diluted to a final volume of 200.0 mL. Atomic emission spectroscopy is then used to measure the emission intensity of each solution. Unknown volume Standard volume (mL) 15.00 15.00 15.00 15.00 15.00 concentration: + |+ Based on the data in the table, determine the original concentration of Na+ and its uncertainty in the unknown sample. Report the uncertainty with three significant figures. 1.3 0.098 Incorrect 0.056 Incorrect (mL) 0.00 0.182 Incorrect 5.00 10.00 15.00 20.00 Final volume (mL) 200.0 200.0 200.0 200.0 200.0 Please help solve for uncertainty. Show work to arrive at final answer. incorrect answers shown below: µg/mL Emission intensity 343.0 486.0 634.0 799.0 940.0 ± 0.307 Incorrect µg/mL µg/mL µg/mL µg/mL
Transcribed Image Text:Atomic emission spectroscopy and the method of standard addition are used to determine the Na+ concentration and its uncertainty in an unknown sample. Increasing amounts of a 1.75 µg/mL standard Na+ solution are added to a series of volumetric flasks containing 15.00 mL of the unknown solution. The volumetric flasks are then diluted to a final volume of 200.0 mL. Atomic emission spectroscopy is then used to measure the emission intensity of each solution. Unknown volume Standard volume (mL) 15.00 15.00 15.00 15.00 15.00 concentration: + |+ Based on the data in the table, determine the original concentration of Na+ and its uncertainty in the unknown sample. Report the uncertainty with three significant figures. 1.3 0.098 Incorrect 0.056 Incorrect (mL) 0.00 0.182 Incorrect 5.00 10.00 15.00 20.00 Final volume (mL) 200.0 200.0 200.0 200.0 200.0 Please help solve for uncertainty. Show work to arrive at final answer. incorrect answers shown below: µg/mL Emission intensity 343.0 486.0 634.0 799.0 940.0 ± 0.307 Incorrect µg/mL µg/mL µg/mL µg/mL
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