1.

One dm^(3) solution containing 10^(-5) moles each of Cl^(-) ions and CrO_(4)^(2-) ions is treated with 10^(-4) moles of silver nitrate. Which one of the following observations is made ?[K_(sp)Ag_(2)CrO_(4)=4xx10^(-12)][K_(sp)AgCl=1xx10^(-10)]

Answer»

PRECIPITATION does not OCCUR.
Silver chromate gets precipitated first
silver chloride gets precipitated first.
Both silver chromate and silver chloride start PRECIPITATING simultaneously.

Solution :Ionic product of `AgCl=[10^(-4)][10^(-5)]=10^(-9)`
Ionic product of `Ag_(2)Cr_(4)=[10^(-8)][10^(-5)]=10^(-13)`
Ionic product of `AgClgtK_(sp)` of `AgCl`
So, precipitation will take place. Ionic product of `Ag_(2)CrO_(4)ltK_(sp)` of `Ag_(2)CrO_(4)`
So, precipitation will not take place.


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