Fluoride ion selective electrodes obey the following equation: E(V)-K-B(0.0592)log[F] where the fluoride concentration is expressed as mol/L and the temperature coefficient p is normally equal to 1.
Fluoride ion selective electrodes obey the following equation: E(V)-K-B(0.0592)log[F] where the fluoride concentration is expressed as mol/L and the temperature coefficient p is normally equal to 1.
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 147CP: The measurement of pH using a glass electrode obeys the Nernst equation. The typical response of a...
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![Fluoride ion selective electrodes obey the following equation:
E(V)-K-B(0.0592)log[F]
where the fluoride concentration is expressed as mol/L and the temperature coefficient p is normally equal to 1.
In a normal calibration procedure you dilute a standard fluoride solution to between 10 and 20 mg/L fluoride ion and then measure the response of the
electrode, You then plot the data and do a linear regression to obtain the fitting coefficients K and 3. Use the plotting and linear regression tools in Excel to
calculate K and 3 from the data in the table. The coefficient is close to 1, and can be determined from a calibration curve.
F concentration
(mg/L)
10.0
12.0
16.0
18.0
20.0
E(V)
-0.351
-0.356
-0.350
-0.364
-0.367
-0.369
What value of K do you obtain from your plot?
-0.551✔
-0.551
What value of $ do you obtain from your plot?
100✔
1.03
EGG PR
MyCi
ou Play
Po Sum
ege Ten
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Transcribed Image Text:Fluoride ion selective electrodes obey the following equation:
E(V)-K-B(0.0592)log[F]
where the fluoride concentration is expressed as mol/L and the temperature coefficient p is normally equal to 1.
In a normal calibration procedure you dilute a standard fluoride solution to between 10 and 20 mg/L fluoride ion and then measure the response of the
electrode, You then plot the data and do a linear regression to obtain the fitting coefficients K and 3. Use the plotting and linear regression tools in Excel to
calculate K and 3 from the data in the table. The coefficient is close to 1, and can be determined from a calibration curve.
F concentration
(mg/L)
10.0
12.0
16.0
18.0
20.0
E(V)
-0.351
-0.356
-0.350
-0.364
-0.367
-0.369
What value of K do you obtain from your plot?
-0.551✔
-0.551
What value of $ do you obtain from your plot?
100✔
1.03
EGG PR
MyCi
ou Play
Po Sum
ege Ten
sty
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