Question
The arsenic in a 1.223 gm sample of a pesticide was converted to H3ASO4, by suitable treatment. The acid was then neutralized and exactly 40 ml of 0.08 M AgNO3, was added to precipitate the arsenic quantitavely as Ag3Aso4, The excess Ag^+ in the filterate required 11.27 ml of 0.I M KSCN asAg ^++ SCN^- =AgSCN (s) Calculate the percent As2o3, in the sample.(As2O3198)