A0.600 g sample containing arsenic (As) was converted to H,AsO, by suitable treatment. 40.00 mL of 0.07891 M AGNO, was then added to the acid to precipitate arsenic quantitatively as Ag3AsO,. The excess AgNO, was back-titrated with I1.27 mL.of 0.1000 M KSCN; the Reaction was Calculate the percent of As,Og in the sample. 1. O5.47 2. 02.23 3. 11.15 4. O 66.92 5. O33.45 Previous Next

A0.600 g sample containing arsenic (As) was converted to H,AsO, by suitable treatment. 40.00 mL of 0.07891 M AGNO, was then added to the acid to precipitate arsenic quantitatively as Ag3AsO,. The excess AgNO, was back-titrated with I1.27 mL.of 0.1000 M KSCN; the Reaction was Calculate the percent of As,Og in the sample. 1. O5.47 2. 02.23 3. 11.15 4. O 66.92 5. O33.45 Previous Next

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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3. A 10.0-mL sample of aqueous NaOCl is treated with excess KI in an acidic solution. The quantity of iodine that is liberated is such that 28.02 mL of 0.0250 M 2- S,0“ solution must be added to cause the disappearance of the dark blue color due to 3 starch indicator. What is the molarity of the solution of NaOCl?