Answer to Question #167455 in Chemistry for Phyroe

Question

If 140 ml of 0.1 F AgNO3 is required to precipitate, quantitatively, silver chloride from 120 ml of KCl solution, what is the formality of the KCl solution the equation for this chemical reaction is Ag+ + Cl- =AgCl 

Answer 1

AgNO₃ + KCl = AgCl + KNO₃

n (AgNO₃) = n (KCl)

n = C_M x V

0.1 x 0.140 = C_M(KCl) x 0.120

C_M(KCl) = (0.1 x 0.140)/0.120 = 0.12 M