A 1.223 g sample containing arsenic (As) was converted to H3ASO4 by suitable treatment. 40.00 mL of 0.07891 M AGNO3 was then added to the acid to precipitate arsenic quantitatively as Ag3AsO4. The excess AgNO3was back-titrated with 11.27 mL of 0.1000 M KSCN ; the Reaction was Calculate the percent of As203 in the sample. 1. O5.47 2. O2.23 3. O11.15 4. O 66.92 5. O33.45
A 1.223 g sample containing arsenic (As) was converted to H3ASO4 by suitable treatment. 40.00 mL of 0.07891 M AGNO3 was then added to the acid to precipitate arsenic quantitatively as Ag3AsO4. The excess AgNO3was back-titrated with 11.27 mL of 0.1000 M KSCN ; the Reaction was Calculate the percent of As203 in the sample. 1. O5.47 2. O2.23 3. O11.15 4. O 66.92 5. O33.45
Chapter13: Titrations In Analytical Chemistry
Section: Chapter Questions
Problem 13.22QAP
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