94 A solution is a mixture of 0 06 M KCI and 0 06 M KI AgNO3 - Chemistry - Equilibrium

Question

94 A solution is a mixture of 0 06 M KCI and 0 06 M KI
AgNO3 solution is being added drop by drop till AgCl
starts precipitating (Ksp AgCl = l × 10 - 10 and
Ksp Agl = 4 × 10 - 16 ) The concentration of
Iodideion at this stage will be nearly equal to •
(1) 4 0 x 10-5 M
(2) 2 4 x 10-7 M
(3) 2 0 x 10-8 M
(4) 4 x 10-8 M

Vartika Jain · Accepted Answer

Dear Student,

Ksp(AgCl) = [Ag+][Cl-]KCl is a strong electrolyte, so [KCl]=[Cl-]=0
06 MSo, concentration of Ag+ when AgCl starts precipitating is[Ag+] =Ksp(AgCl)[Cl-]           =1×10-100
06Now, Ksp(AgI) = [Ag+][I-]So, [I-]=Ksp(AgI)  [Ag+]             =4×10-16×0
0610-10             =0
24×10-6             =2
4×10-7Hence, correct answer is (2)