1.0 grams of a sample containing phosphorus was dissolved into PO, and the sample was diluted to 500 mL with distilled water. 25.0 mL of 0.07521 M AgNO, solution was added on the 100.0 mL portion of this solution and all of the phosphorus was precipitated as Ag;PO, If the remaining AgNO, is back-titrated with 5.2 mL 0.0585 M KSCN in the presence of Fe' indicator, calculate the phosphorus in the sample a) as % P b) as %2,0,? ( /mol: P = 31; 0 = 10) Precipitation reaction: P0, + 3Ag Ag3PO, (s): Titration reaction: Ag + SCN --- AgSCN (s)