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Question: Answered & Verified by Expert
1dm3 solution containing 105 moles each of Clions and CrO42 ions is treated with 104 moles of silver nitrate. Which one of the following observations is made?
[KspAg2CrO4=4×1012][KspAgCl=1×1010]
ChemistryIonic EquilibriumKCETKCET 2010
Options:
  • A Precipitation does not occur
  • B Silver chromate gets precipitated first
  • C Silver chloride gets precipitated first
  • D Both silver chromate and silver chloride start precipitating simultaneously
Solution:
1699 Upvotes Verified Answer
The correct answer is: Silver chloride gets precipitated first
For precipitation,
ionic product > solubility product (Ksp)
For Ag2CrO4
 ionic product =[Ag+]2[CrO4]=(104)2(105)=1013
Ksp of Ag2CrO4=4×1012
Here, Ksp>IP
Thus, no precipitate is obtained.
For AgCl,
ionic product =[Ag+][Cl]
=[104][105]
=109
Ksp(AgCl)=1×1010
Here, IP > Ksp
So, precipitate will form.
Thus, silver chloride gets precipitated first.

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