Answer to Question #167494 in Chemistry for Phyroe

Question

If 220 ml of 1 F AgNO2 is required to react quantitatively with 150 ml of KCN solution according to the reaction expressed by the equation Ag+ + 2CN- = Ag(CN)2-

Answer 1

AgNO₂ + 2KCN = (Ag(CN)₂)K+ KNO₂

n (AgNO₂) = 2 x n (KCN)

n = C_M x V

1 x 0.220 = 2 x (C_M(KCN) x 0.150)

C_M(KCN) = (1 x 0.220)/ (2 x 0.150) = 0.733 M