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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?

Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter23: Potentiometry
Section: Chapter Questions
Problem 23.14QAP
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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 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
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 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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