A 1.223 g sample containing arsenic (As) was converted to H3As0, by suitable treatment. 40.00 ml. of 0.07891 M AGNO3 was then added to the acid to precipitate arsenic quantitatively as AggAso1. The excess AgNO3was back titrated with 11.27 mL of 0.1000 M KSCN ; the Reacti on was Calcul ate the percent of As,03 in the sample. 1. O5.47 2. O2.23 3. O11.15 4. O 66.92 5. O33.45

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A1.223 g sample containing arsenic (As) was converted to H3AS0, by suitable treatment. 40.00 ml. of 0.07891 M AGNO3 was then
added to the acid to precipitate arsenic quantitatively as AgAs01. The excess AgNO3was back-titrated with 11.27 ml. of 0.1000 M
KSCN ; the Reacti on was Cal culate the percent of As,03 in the sample.
1. O5.47
2. O2.23
3. O11.15
4. O66.92
5. O33.45
Transcribed Image Text:A1.223 g sample containing arsenic (As) was converted to H3AS0, by suitable treatment. 40.00 ml. of 0.07891 M AGNO3 was then added to the acid to precipitate arsenic quantitatively as AgAs01. The excess AgNO3was back-titrated with 11.27 ml. of 0.1000 M KSCN ; the Reacti on was Cal culate the percent of As,03 in the sample. 1. O5.47 2. O2.23 3. O11.15 4. O66.92 5. O33.45
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