23. Indirect analysis. A 0.6200-g sample that contains NaCl, NaBr, and impurities gives aprecipitate of AgCl and AgBr that weighs 0.5120 g. Another 0.6200-g sample is titratedwith 0.1070 M AGNO3, requiring 28.10 mL. Calculate the percentages of NaCl and NaBr inthe sample.

Answered: 3. Indirect analysis. A 0.6200-g sample…

Chemistry

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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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2. A 132 mL sample of Ca(OH)2 solution was titrated with 2.45 M H₂SO4. 287 mL of the acid was required to reach the endpoint of the titration. Based on these values, the Molar concentration of the analyte is 5.33. H₂SO4 + Ca(OH)2 ---> CaSO4 + 2H₂O A. True B. False
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2. After dissolving the KHP with water, a student noticed some undissolved solid, but continued with the titration as instructed by the procedure. He titrated until the pink color persisted for 30 sec and recorded the volume of titrant required. Preparing for the second determination, he set the reaction solution aside and added some more NaOH to the buret. He was about to pour the reaction solution down the drain, so he could rinse and reuse the flask, when he saw that the pink color had disappeared! a) What happened? b) What can the student do to correct for this erTor and salvage this trial? How should the data sheet be modified to reflect this correction? 3. Another student began adding titrant to the acid solution, but stopped when she suddenly realized that she forgot to add the 3 drops of phenolphthalein. When she did, the solution immediately turned dark red! a) What happened? b) What can the student do to correct for this error and salvage this trial? How should the data sheet…
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3. Indirect analysis. A 0.6200-g sample that contains NaCl, NaBr, and impurities gives a precipitate of AgCl and AgBr that weighs 0.5120 g. Another 0.6200-g sample is titrated with 0.1070 M AgNO3, requiring 28.10 mL. Calculate the percentages of NaCl and NaBr the sample.