The arsenic in a 1.223-g sample of a pesticide was converted to H3ASO4 by suitable treatment. The acid was then neutralized, and 40.00 ml of 0.07891 M AGNO3 was added to precipitate the arsenic quantitatively as Ag;AsO4. The excess Ag* in the filtrate and washings from the precipitate was titrated with 11.27 ml of 0.1000 M KSCN; the reaction was Ag* + SCN > AgSsCN a) How many moles of silver reacted and precipitated out with arsenic? b) What is the percent As203 (197.8432 g/mol) in the sample of pesticide? (Hint: Ag3AsO4 will decompose into As203, Ag (s), and 02 (e).
The arsenic in a 1.223-g sample of a pesticide was converted to H3ASO4 by suitable treatment. The acid was then neutralized, and 40.00 ml of 0.07891 M AGNO3 was added to precipitate the arsenic quantitatively as Ag;AsO4. The excess Ag* in the filtrate and washings from the precipitate was titrated with 11.27 ml of 0.1000 M KSCN; the reaction was Ag* + SCN > AgSsCN a) How many moles of silver reacted and precipitated out with arsenic? b) What is the percent As203 (197.8432 g/mol) in the sample of pesticide? (Hint: Ag3AsO4 will decompose into As203, Ag (s), and 02 (e).
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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Transcribed Image Text:The arsenic in a 1.223-g sample of a pesticide was converted to H3ASO, by suitable
treatment. The acid was then neutralized, and 40.00 mL of 0.07891 M AGNO3 was
added to precipitate the arsenic quantitatively as Ag3AsO4. The excess Ag* in the filtrate
and washings from the precipitate was titrated with 11.27 ml of 0.1000 M KSCN; the
reaction was
Ag* + SCN → AgSCN
a) How many moles of silver reacted and precipitated out with arsenic?
b) What is the percent As203 (197.8432 g/mol) in the sample of pesticide?
(Hint: Ag3AsO4 will decompose into As203, Ag (s), and O2 (2).
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