Fluoride ion selective electrodes obey the following equation: E(V) K-3(0.0592)log[F] where the fluoride concentration is expressed as mol/L and the temperature coefficient B 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 B. Use the plotting and linear regression tools in Excel to calculate K and 3 from the data in the table. The coefficient 3 is close to 1, and can be determined from a calibration curve. F concentration (mg/L) 10.0 12.0 14.0 16.0 18.0 20.0 E(V) -0.309 -0.314 -0.318 -0.321 -0.324 -0.327 What value of K do you obtain from your plot? 4.0 x What value of 3 do you obtain from your plot?

Fluoride ion selective electrodes obey the following equation: E(V) K-3(0.0592)log[F] where the fluoride concentration is expressed as mol/L and the temperature coefficient B 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 B. Use the plotting and linear regression tools in Excel to calculate K and 3 from the data in the table. The coefficient 3 is close to 1, and can be determined from a calibration curve. F concentration (mg/L) 10.0 12.0 14.0 16.0 18.0 20.0 E(V) -0.309 -0.314 -0.318 -0.321 -0.324 -0.327 What value of K do you obtain from your plot? 4.0 x What value of 3 do you obtain from your plot?

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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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

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 B 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 B. Use the plotting and linear regression tools in Excel to calculate K and 3 from the data in the table. The coefficient 3 is close to 1, and can be
determined from a calibration curve.
F concentration
(mg/L)
10.0
12.0
14.0
16.0
18.0
20.0
E(V)
-0.309
-0.314
-0.318
-0.321
-0.324
-0.327
What value of K do you obtain from your plot?
X
What value of B do you obtain from your plot?
X
4.0

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