1 dm3 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 observation is made?`[K_(sp)Ag_(2)CrO_(4)=4xx10^(-12)] , [K_(sp) AgCl=1xx10^(-10)]`

Options

A. Precipitation does not occur
B. Silver chromate gets precipitated first
C. Silver chloride gets precipitated first
D. Silver chloride gets precipitated first

Answer

C

Explanation

Ionic product of AgCl = `[10^(-4)] [10^(-5)]=10^(-9)`
Ionic product of `Ag_(2)CrO_(4) = [10^(-8)][10^(-5)] =10^(-13)`
Ionic product of `AgCl gt K_(sp) ` of AgCl
So, precipitation will take place.
Ionic product of `"Ag"_(2)CrO_(4) lt K_(sp) " of Ag"_(2)CrO_(4)`
So, precipitation will not take place.