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...

See similar textbooks

Related questions

Q: 7. The potential observed in the cell diagrammed below (Ecell) is +0.290 V with the hydrogen…

Q: Explain the significance of the standard hydrogen electrode (SHE) in the tabulation of standard…

A: The standard hydrogen electrode (SHE) in the tabulation of standard reduction potentials refers to…

Q: For the cell constructed from the hydrogen electrode and metal-insoluble salt electrode, calculate…

A: calculate the mean activity coefficient for 0.124 b HCl solution if E= 0.342V at 298K.…

Q: Calculate the potential of an alloy (Ni) electrode immersed in Ni(OH)2, pH = 9.00, Ksp = 6.5 ×…

A: In electrochemistry, electrode potential is the electromotive force of a galvanic cell built from a…

Q: The resistances of a series of aqueous NaCl solutions, formed by successive dilution of a sample,…

A: Kohlrausch's Law According to Kohlrausch's Law, an electrolyte's equivalent conductivity at infinite…

Q: The selectivity coefficient, Kg+.H*, for a K* ion-selective electrode is 0.00240. When the electrode…

A: For an ion-selective electrode, the potential is given as: E=constant+β0.05916.log[AK++(KK+,H+×AH+)]…

Q: Fluoride ion selective electrodes obey the following equation: E(V)-K-B(0.0592)log[F] where the…

A: Given: Fluoride ion selective electrode obeys the following equation: E(V)= k-β(0.0592) log [F-]…

Q: A solution prepared by mixing 22.2 mL of 0.400 M NaCl and 22.2 mL of 0.400 M KI was titrated with…

A: Answer is 7.48 x 10-16 M .

Q: Select the correct cell notation for the following reaction, which is setup as a cell with a…

A: Oxidation (loss of electrons) occurs at anode and reduction (gain of electrons) takes place at…

Q: The anode in the above cell can actually be considered a standard hydrogen electrode if…

A: The objective of this question is to show the cell configuration, the anode is a standard hydrogen…

Q: Calculate the potential of the following half-cell take ionic strength effect into consideration:…

A: The half cell reaction taking place is: Standard potential (E0) = 0.77 V Number of ions displaced…

Q: The selectivity coefficient, KK+H+, for a K+ ion-selective electrode is 0.00696. When the electrode…

A: For an ion-selective electrode, the potential is given as:

Q: A cell composed of a platinum indicator electrode and a silver-silver chloride reference electrode…

A: The detailed solution of the given question is done below in step 2. Here it is important to note…

Q: From standard reduction potentials, calculate the equilibrium constant at 25 °C for the reaction…

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

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

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

Part A The cell potential of the following electrochemical cell depends on the pH of the solution in the anode half-cell: Pt(s) H2 (g, 1 atm)|H (aq, ? M)||Cu" (aq, 1.0 M)|Cu(s). What is the pH of the solution if Ecell is 375 mV ? Express your answer using two significant figures. ΑΣφ ? pH = Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining ( Return to Assignment Provide Feedback
A solution prepared by mixing 60.0 mL of 0.360 M AGNO, and 60.0 mL of 0.360 M TINO, was titrated with 0.720 M NaBr in a cell containing a silver indicator electrode and a reference electrode with a constant potential of 0.175 V. The reference electrode is attached to the positive terminal of the potentiometer, and the silver electrode is attached to the negative terminal. The solubility constant of TIBr is Kp = 3.6 × 10-6 and the solubility constant of AgBr is = 5.0 x 10-13. Ksp Which precipitate forms first? O TIBI O AgBr Which of the expressions shows how the cell potential, E, depends on [Ag*]? E = 0.175 V – [0.799 V – 0.05916log ([Ag+])] 1 E = |0.799 V – 0.05916log - 0.175 V [Ag*) E = [0.799 V – 0.05916log ([Ag*]D] – 0.175 V E = 0.175 V - |0.799 V – 0.05916log [Ag* * (ল) Calculate the first and second equivalence points of the titration. first equivalence point: mL second equivalence point: mL What is the cell potential after each of the given volumes of 0.720 M NaBr have been…
lon selective electrode (ISE) is an electrochemical device for the selective determination of the concentration/activity of an ion based on the principle of potentiometry. Typical examples include pH electrodes and the fluoride ISE. To use an ISE, the potential of the ISE is first measured with a range of solutions containing different concentrations of the analyte. Then, a calibration curve is constructed by plotting the potential versus log₁0[ion]. For an ideal Ca²+ ion selective electrode, which of the following slopes is the one that you would expect? (T = 25 °C) Select one: a. -30 mV/dec O b. O c. 30 mV/dec 59 mV/dec O d. -59 mV/dec
What is the schematic representation of a cell with a saturated calomel electrode as the reference electrode and a silver indicator electrode to measure the p-function of [CrO4²-]? SCE | Ag2CrO4(sat'd), CrO42-(x M)| Ag O SCE || Ag2 CrO4(s), CrO4²-(x M)| Ag SCE ||Ag2 CrO4(sat'd), CrO4²-(x M) | Ag SCE || Ag2CrO4(s), CrO4²-(x M) | Ag