The arsenic in a 1.27 g sample of a pesticide was converted toAsO3−4 by suitable chemical treatment. It was then titrated usingAg+ to form Ag3AsO4 as a precipitate.
A- What is the oxidation state of  As in AsO3−4?
B- Name Ag3AsO4 by analogy to the corresponding compoundcontaining phosphorus in place of arsenic.
C- If it took 21.0 mL of 0.106 M Ag+ to reach the equivalencepoint in this titration, what is the mass percentage of arsenic inthe pesticide?
