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Question: Answered & Verified by Expert
The simultaneous solubility of AgCN Ksp=2.5×10-6 and AgCl Ksp=1.6×10-10 in 1 M NH3 (aq) are respectively
Given Kf[Ag(NH3)2]+=107
ChemistryIonic EquilibriumJEE Main
Options:
  • A 1.58×10-3,1.26×10-5
  • B 0.04,6.25×10-8
  • C 5.58×10-8,0.037
  • D 0.037,5.78×10-8
Solution:
2028 Upvotes Verified Answer
The correct answer is: 0.037,5.78×10-8
AgCl(s)+2NH30-2x(aq)⇌Ag(NH3)2+x+Cl-(aq)x
K1=1.6×10-10×107=1.6×10-3
K1=[Ag(NH3)2+[Cl-][NH3]2
[Cl-][CN-]=1.6×10-32.5×10-9=6.4×105
K1=x2(1-2x)2=1.6×10-3
x(1-2x)=0.04
x=0.037
[CN-]=0.0376.4×105=5.78×10-8

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