Answer to Question #74388 in General Chemistry for Fatima

Question

If 25.1mL of 0.152M K3AsO4 (aq) is mixed with 35.3mL of 0.0786M AgNO3 (aq), how many grams of silver arsenate will be produced?

Answer 1

3AgNO3+ K3AsO4= Ag3AsO4+ KNO3
n(AgNO3)=C*V=0.0786*0.0353=2.778*10^-3 mol
n(K3AsO4)=C*V=0.152*0.0251=3.82*10^-3 mol
n(AgNO3)< n(K3AsO4), AgNO3-limiting reagent
n(Ag3AsO4)= n(AgNO3)/3=2.778*10^-3/3=9.24*10^-4 mol
n(Ag3AsO4)=n*M=9.24*10^-4*419=0.388 g