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create a schematic diagram for the provided procedure

create a schematic diagram for the provided procedure

Chemistry
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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create a schematic diagram for the provided procedure

D. Analysis of unknown sample Note: Your sample may contain either NaOH only, Na2CO3 only, NaHCO3 only, or an allowed two component combination of any of these three constituents. 1. Pipette two 50-mL aliquot of your liquid sample into two Erlenmeyer flasks. Treat each aliquot individually after this point. 2. To the first aliquot, add 3 drops of phenolphthalein indicator. 3. To the second aliquot, add 3 drops of methyl orange indicator. 4. Titrate the first aliquot with standard HCI until the appropriate color change. Compute for the volume of HCl used. 5. For the second aliquot, titrate with standard HCl until the color changes. Boil for 2-3 mins, and then cool. Titrate again until the appropriate color change. 6. From the total volume of HCl used for the titration of the second aliquot, subtract the indicator correction. 7. From the true volume of HCI used, determine the constituents and compute for the molarity of each. Perform triplicate analyses. Compute for the mean molarity, SD, and % RSD for the replicate measurements.
Transcribed Image Text:D. Analysis of unknown sample Note: Your sample may contain either NaOH only, Na2CO3 only, NaHCO3 only, or an allowed two component combination of any of these three constituents. 1. Pipette two 50-mL aliquot of your liquid sample into two Erlenmeyer flasks. Treat each aliquot individually after this point. 2. To the first aliquot, add 3 drops of phenolphthalein indicator. 3. To the second aliquot, add 3 drops of methyl orange indicator. 4. Titrate the first aliquot with standard HCI until the appropriate color change. Compute for the volume of HCl used. 5. For the second aliquot, titrate with standard HCl until the color changes. Boil for 2-3 mins, and then cool. Titrate again until the appropriate color change. 6. From the total volume of HCl used for the titration of the second aliquot, subtract the indicator correction. 7. From the true volume of HCI used, determine the constituents and compute for the molarity of each. Perform triplicate analyses. Compute for the mean molarity, SD, and % RSD for the replicate measurements.
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