5. An analyst at Procter & Gamble quality control department received a sample of toothpaste to determine the %fluoride. The analyst prepared a series of fluoride calibration standards and a total ionic strength adjusting buffer (TISAB) to standardize the fluoride electrode. The results of the potential measurements of the calibration standards are depicted on the figure. The analyst dissolved 0.2364 g of the toothpaste in 100 ml of DI water containing the TISAB. Then, measured the potential of the toothpaste solution to be-170 mv. -100 -200 10 lewe d - Estimate the linear concentration range of this fluoride selective electrode. Peal chang, V

5. An analyst at Procter & Gamble quality control department received a sample of toothpaste to determine the %fluoride. The analyst prepared a series of fluoride calibration standards and a total ionic strength adjusting buffer (TISAB) to standardize the fluoride electrode. The results of the potential measurements of the calibration standards are depicted on the figure. The analyst dissolved 0.2364 g of the toothpaste in 100 ml of DI water containing the TISAB. Then, measured the potential of the toothpaste solution to be-170 mv. -100 -200 10 lewe d - Estimate the linear concentration range of this fluoride selective electrode. Peal chang, V

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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Question

50
5. An analyst at Procter & Gamble quality control department
received a sample of toothpaste to determine the %fluoride. The
analyst prepared a series of fluoride calibration standards and a
total ionic strength adjusting buffer (TISAB) to standardize the
fluoride electrode. The results of the potential measurements of
the calibration standards are depicted on the figure. The analyst
dissolved 0.2364 g of the toothpaste in 100 ml of DI water
containing the TISAB. Then, measured the potential of the
toothpaste solution to be -170 mv.
-100
-150
-200
-250
300
10
Lewer deteton
Uer detten
- Estimate the linear concentration range of this fluoride selective electrode.
i- Calculate the concentration of fluoride in the toothpaste solution.
li- Calculate the mass of fluoride in the toothpaste sample.
iv- Calculate the %F- in this toothpaste.
y-63.1x - 401.2
Potential change, mV

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