The Eu(III) standards adled to the groundwater sample contained 0.160 ng/ml. (ppb) of Eu(llI). Calculate the concentration of Eu(lII) in the groundwater sample. Eu(III) concentration: ng/ml. The Th(III) standards adkled to the groundwater sample contained 16.0 ng/ml. (ppb) of Tb(III). Calculate the concentration of Th(III) in the groundwater sample. Th(III) concentration: ng/ml.

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...
icon
Related questions
Question
Trace amounts of rare clements are found within groundwater
and are of interest to goochemists. Earopium and terbium are
30 -
lanthanide-scries clements that can be measured from the
intensity of their fluorescence emittcd when a solution is
illuminated with ultraviolet radiation. Certain organic
25 -
compounds that bind Eu(III) and Tb(IIl) enhance the
cmission, and substances found in natural waters can decrease
20-
the cmission. For that reason it is necessary to use standard
Eu (II)
additions to the sample to correct for such interference. The
graph shows the result of such an cxperiment in which the
15-
concentration of Eu(III) and Tb(III) was mcasured in a
sample of groundwatler. The x-intercept of the Eu(III) plot is
10-
-23.1 ml. and the x-intercept of the Th(III) plot is -9.91 ml.
In cach case, 10.00 ml. of the sample solution and 15.00 ml.
5-
Tb (III)
of an organic additive were added to a scries of live 50 ml.
volumctric flasks. The standard Eu(lI) or Th(III) solution (0,
5.00, 10.00, 15.00, and 20.00 ml.) was then added to the
-25 -20 -15 -10 50 5 10 15 20 25
Added volume of Standard (mlL)
flasks and they were diluted to 50.0 ml. with water.
The Eu(III) standards added to the groundwater sample contained 0.160 ng/ml. (ppb) of Eu(III). Calculate the concentration of
Eu(III) in the groundwater sample.
Eu(III) concentration:
ng/ml.
The Tb(III) standards added to the groundwater sample contained 16.0 ng/ml. (ppb) of Tb(III). Calculate the concentration of
Th(III) in the groundwater sample.
Th(III) concentration:
ng/ml.
Emission
Transcribed Image Text:Trace amounts of rare clements are found within groundwater and are of interest to goochemists. Earopium and terbium are 30 - lanthanide-scries clements that can be measured from the intensity of their fluorescence emittcd when a solution is illuminated with ultraviolet radiation. Certain organic 25 - compounds that bind Eu(III) and Tb(IIl) enhance the cmission, and substances found in natural waters can decrease 20- the cmission. For that reason it is necessary to use standard Eu (II) additions to the sample to correct for such interference. The graph shows the result of such an cxperiment in which the 15- concentration of Eu(III) and Tb(III) was mcasured in a sample of groundwatler. The x-intercept of the Eu(III) plot is 10- -23.1 ml. and the x-intercept of the Th(III) plot is -9.91 ml. In cach case, 10.00 ml. of the sample solution and 15.00 ml. 5- Tb (III) of an organic additive were added to a scries of live 50 ml. volumctric flasks. The standard Eu(lI) or Th(III) solution (0, 5.00, 10.00, 15.00, and 20.00 ml.) was then added to the -25 -20 -15 -10 50 5 10 15 20 25 Added volume of Standard (mlL) flasks and they were diluted to 50.0 ml. with water. The Eu(III) standards added to the groundwater sample contained 0.160 ng/ml. (ppb) of Eu(III). Calculate the concentration of Eu(III) in the groundwater sample. Eu(III) concentration: ng/ml. The Tb(III) standards added to the groundwater sample contained 16.0 ng/ml. (ppb) of Tb(III). Calculate the concentration of Th(III) in the groundwater sample. Th(III) concentration: ng/ml. Emission
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Stoichiometry
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY