A serum containing sodium Na + gives a signal of 3.09 mV in an atomic emission analysis.Then 4.00 mL of a 1.08 M solution of a standard NaCl solution is added to 96.0 mL. Thisfortified sample gives a signal of 7.99 mv. Find the original concentration of Na +.

Given that : Initial signal of Na+ = 3.09 mV The volume of added NaCl = 4.00 mL Molarity of the NaCl…

Answered: A serum containing sodium Na + gives a…

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...

See similar textbooks

Similar questions

In order to measure riboflavin in a breakfast cereal, a 5.00-gram sample of the cereal was extracted with acetic acid and filtered. The extract was transferred to a 50.0 mL volumetric flask and diluted to the mark. The sample was transferred to a cuvette and the fluorescence was measured. The instrument read 59 units (Fluorescence units –an arbitrary scale). 24.00 mL of the cereal extract was sample was mixed with 1.0 mL of a riboflavin standard that was 0.500 ug/mL. The fluorescence of this mixture was measured and read 94 fluorescence units. Calculate the concentration of riboflavin per gram of cereal (use µg/gram of cereal).
The nickel level in a soil sample was determined using AAS. A 3.0 g sample was dissolved in acid and then diluted to a total volume of 100.0 mL. The absorbance of this solution determined at a wavelength of 232 nm, was found to be0.3. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. Calculate the mass of nickel in mg.
mass of copper = 2.494g; Wavelength = 830.6 Volume of volumetric flask - 50 ml Here's the absorbance of all the test tube
Explain the advantages and disadvantages of mass spectrometry?
The equation for the calibration curve prepared with a series of standard Na + solutions (1-5 mg / L) was calculated as y = 43.5x + 11.5. Since the emission intensity of the water sample prepared by diluting 10 times under the same conditions is 80, calculate the Na + concentration of the water sample in mg / L.
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 ug/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 Emission (mL) (mL) (mL) intensity 15.00 0.00 200.0 351.0 15.00 5.00 200.0 494.0 15.00 10.00 200.0 642.0 15.00 15.00 200.0 807.0 15.00 20.00 200.0 948.0 Based on the data in the table, determine the original concentration of Nat and its uncertainty in the unknown sample. Report the uncertainty with three significant figures. concentration: ug/mL µg/mL
For an independent project, a student decides to analyze the blue coloring in mouthwash samples using the same spectrophotometry technique. A test of a mouthwash sample in a standard 1.0 cm wide cuvette results in an absorbance reading of 0.359. The student asks for your help in finding the concentration of Blue #1 in her mouthwash sample. Based on your understanding of today's experiment, how would you explain to the student how she could determine the concentration of Blue #1 in her sample? Use your own Beer's Law calibration data and molar absorptivity to lead her through a sample calculation, showing her how to calculate and report the concentration (using correct units) of Blue #1 in her mouthwash sample. Upload a picture or screen shot of your work.
a student in the previous question measured the absorbance of green light from a beverage that contains Red#40 and She finds that the absorbance of the beverage is 0.322. Using the calibration curve from the previous question, what would be the concentration (mM) of Red#40 in the beverage? 0.0322, 0.0497, 2.069, or 0.0008
Which of the following statements is incorrect? 1.)A conventional mass spectrometer does not employ a spectrophotometric detector. 2.)Conventional mass spectrometry does not always require high purity samples. 3.)A mass spectrum shows no signals due to uncharged species. 4.)A conventional mass spectrometer uses high energy UV radiation.
You have conducted an experiment where you obtained 22.4g ZnCl2. The accepted value is 22.7g. What is the error and relative (%) error?
You are required to measure a sample that absorbs at a wavelength of 300 nm and 4 µm.What would you use as your light source? Justify your answer.
Referring to the posted calibration curve ...A 2.345 g sample of a ruthenium ore was dissolved and diluted to 100.00 mL. 4.000 mL of this sample was removed, treated appropriately, and diluted to 50.00 mL. This solution has an absorbance of 0.320. Calculate how many grams of ruthenium (MW = 101.07 g/mol) were in the sample.Select one:1.6 1.3 51 52 1.2

SEE MORE QUESTIONS

Recommended textbooks for you

Chemistry

ISBN:

9781305957404

Author:

Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:

Cengage Learning

Chemistry

ISBN:

9781259911156

Author:

Raymond Chang Dr., Jason Overby Professor

Publisher:

McGraw-Hill Education

Principles of Instrumental Analysis

Chemistry

ISBN:

9781305577213

Author:

Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:

Cengage Learning

Chemistry

ISBN:

9781305957404

Author:

Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:

Cengage Learning

Chemistry

ISBN:

9781259911156

Author:

Raymond Chang Dr., Jason Overby Professor

Publisher:

McGraw-Hill Education

Principles of Instrumental Analysis

Chemistry

ISBN:

9781305577213

Author:

Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:

Cengage Learning

Organic Chemistry

Chemistry

ISBN:

9780078021558

Author:

Janice Gorzynski Smith Dr.

Publisher:

McGraw-Hill Education

Chemistry: Principles and Reactions

Chemistry

ISBN:

9781305079373

Author:

William L. Masterton, Cecile N. Hurley

Publisher:

Cengage Learning

Elementary Principles of Chemical Processes, Bind…

Chemistry

ISBN:

9781118431221

Author:

Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard

Publisher:

WILEY

SEE MORE TEXTBOOKS

A serum containing sodium Na + gives a signal of 3.09 mV in an atomic emission analysis. Then 4.00 mL of a 1.08 M solution of a standard NaCl solution is added to 96.0 mL. This fortified sample gives a signal of 7.99 mV. Find the original concentration of Na +.