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.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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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
sty
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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