Question

In: Chemistry

AgNO3 is slowly added to an aqueous solution containing 0.02 M AsO43-, 0.02 M I- and...

AgNO₃ is slowly added to an aqueous solution containing 0.02 M AsO₄^3-, 0.02 M I^- and 0.02 M CO₃^2-. In what order would the silver salts precipitate?

K_sp( Ag₃AsO₄)= 1.0 x 10^-22

K_sp (AgI) = 8.3 x 10^-17

K_sp (Ag₂CO₃)= 8.1 x 10^-12

Ag₂CO₃, AgI, Ag₃AsO₄

Ag₃AsO₄, Ag₂CO₃, AgI

Ag₂CO₃, Ag₃AsO₄, AgI

Ag₃AsO4, AgI, Ag₂CO₃

AgI , Ag₃AsO₄, Ag₂CO₃

Expert Solution

AgI , Ag₃AsO₄, Ag₂CO₃

K_sp (AgI) = 8.3 x 10^-17

Ksp = [Ag+][I-]

8.3*10^-17 = [Ag+] *0.02

[Ag+] = 8.3*10^-17/0.02 = 4.15*10^-15 M

K_sp( Ag₃AsO₄)= 1.0 x 10-22

Ag3AsO4 -------------> 3Ag⁺ + AsO4^3-

Ksp = [Ag+]^3 * [AsO4^-3]

1*10^-22 = [Ag+]^3 *0.02

[Ag+]^3 = 5*10^-21

[Ag+] = 1.7*10^-7 M

K_sp (Ag₂CO₃)= 8.1 x 10^-12

Ag2CO3 ----------------> 2Ag^+ + Co3^-2

Ksp = [Ag+]^2[Co3^-2]

8.1*10^-12 = [Ag+]^2 *0.02

[Ag+]^2 = 8.1*10^-12/0.02 = 4.05*10^-10

[Ag+] = 2*10^-5 M

[Ag+] ion conc decreases ppt will be form

AgI , Ag₃AsO₄, Ag₂CO₃ >>>>>>>answer

queen_honey_blossom answered 2 years ago

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