[Ag^+] = 9.1×10^(-9) M AgI [I^-]

[Ag^+] = 9.1×10^(-9) M AgI [I^-]

 

 

Calculate the concentration [I^-] in AgI solution

with [Ag^+] = 9.1×10^(-9) M

 

 

Calculate the concentration of ions in the following saturated solutions:

a) [I^-] in AgI solution

with [Ag^+] = 9.1×10^(-9) M; Ksp = 8.3×10^(-17)

b) [Al^3+] in Al(OH)3 solution

with [OH^-] = 2.9×10^(-9) M; Ksp = 1.8×10^(-33)

 

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a) AgI(s) ⇌ Ag^+(aq) + I^-(aq)

---> Ag^+ : I^- = 1 : 1 계수비(= 몰수비) 이므로,

[Ag^+] = [I^-] = 9.1×10^(-9) M

 

 

 

답: [I^-] = 9.1×10^(-9) M

 

 

 

 

[참고]

Ksp = [Ag^+] [I^-]

= (s) (s) = 8.3×10^(-17)

 

[Ag^+] = 9.1×10^(-9) M 이므로,

(9.1×10^(-9)) (s) = 8.3×10^(-17)

 

s = (8.3×10^(-17)) / (9.1×10^(-9))

= 9.121×10^(-9) M

= 9.1×10^(-9) M = [I^-]