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From the following data calculate the potassium content per tablet in effervescent KCl bicarbonate tablets. Weight of 20 tablets = 35.6751 g Weight of tablet powder taken for assay = 0.1338 g The sample is dissolved in 500 ml of water and then 5 ml of the sample solution is taken and diluted to 100 ml. Weight of KCl used to prepare standard = 0.1912 g The standard was dissolved in 100 ml of water and 5 ml of the standard solution was diluted to 250 ml. The diluted standard solution was used to prepare a calibration series by transferring 0, 5, 10, 15, 20 and 25 ml to 100 ml volumetric flasks and making up to volume. The following readings were obtained for the calibration series: 0, 20.3, 40.1, 60.3, 80.1 and 100. Reading obtained for potassium in the diluted sample solution = 73.9.

From the following data calculate the potassium content per tablet in effervescent KCl bicarbonate tablets. Weight of 20 tablets = 35.6751 g Weight of tablet powder taken for assay = 0.1338 g The sample is dissolved in 500 ml of water and then 5 ml of the sample solution is taken and diluted to 100 ml. Weight of KCl used to prepare standard = 0.1912 g The standard was dissolved in 100 ml of water and 5 ml of the standard solution was diluted to 250 ml. The diluted standard solution was used to prepare a calibration series by transferring 0, 5, 10, 15, 20 and 25 ml to 100 ml volumetric flasks and making up to volume. The following readings were obtained for the calibration series: 0, 20.3, 40.1, 60.3, 80.1 and 100. Reading obtained for potassium in the diluted sample solution = 73.9.

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 80AP
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  1. From the following data calculate the potassium content per tablet in effervescent KCl bicarbonate tablets.
  • Weight of 20 tablets = 35.6751 g
  • Weight of tablet powder taken for assay = 0.1338 g

The sample is dissolved in 500 ml of water and then 5 ml of the sample solution is taken and diluted to 100 ml.

  • Weight of KCl used to prepare standard = 0.1912 g
  • The standard was dissolved in 100 ml of water and 5 ml of the standard solution was diluted to 250 ml.
  • The diluted standard solution was used to prepare a calibration series by transferring 0, 5, 10, 15, 20 and 25 ml to 100 ml volumetric flasks and making up to volume.
  • The following readings were obtained for the calibration series: 0, 20.3, 40.1, 60.3, 80.1 and 100.
  • Reading obtained for potassium in the diluted sample solution = 73.9.

The answer in the book is 496.2 mg of K, however, I can't get to that answer. Can anyone please help with the step-by-step solution? Thanks!

Self-test 6.2 From the following data calculate the potassium content per tablet in effervescent KCI bicarbonate tablets. • Weight of 20 tablets = 35.6751 g • Weight of tablet powder taken for assay = 0.1338 g The sample is dissolved in 500 ml of water and then 5 ml of the sample solution is taken and diluted to 100 ml. • Weight of KCI used to prepare standard = 0.1912 g The standard was dissolved in 100 ml of water and 5 ml of the standard solution was diluted to 250 ml. The diluted standard solution was used to prepare a calibration series by transferring 0, 5, 10, 15, 20 and 25 ml to 100 ml volumetric flasks and making up to volume. The following readings were obtained for the calibration series: 0, 20.3, 40.1, 60.3, 80.1 and 100. • Reading obtained for potassium in the diluted sample solution = 73.9. as a b ( en )
Transcribed Image Text:Self-test 6.2 From the following data calculate the potassium content per tablet in effervescent KCI bicarbonate tablets. • Weight of 20 tablets = 35.6751 g • Weight of tablet powder taken for assay = 0.1338 g The sample is dissolved in 500 ml of water and then 5 ml of the sample solution is taken and diluted to 100 ml. • Weight of KCI used to prepare standard = 0.1912 g The standard was dissolved in 100 ml of water and 5 ml of the standard solution was diluted to 250 ml. The diluted standard solution was used to prepare a calibration series by transferring 0, 5, 10, 15, 20 and 25 ml to 100 ml volumetric flasks and making up to volume. The following readings were obtained for the calibration series: 0, 20.3, 40.1, 60.3, 80.1 and 100. • Reading obtained for potassium in the diluted sample solution = 73.9. as a b ( en )
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