The solubility of product `(K_(sp))` of the following compounds are given at `25^(@)C` `{:("Compound",K_(sp),"Compound",K_(sp),),(AgCl,1.1 xx 10^(-10)
The solubility of product `(K_(sp))` of the following compounds are given at `25^(@)C`
`{:("Compound",K_(sp),"Compound",K_(sp),),(AgCl,1.1 xx 10^(-10),PbCrO_(4),4.0 xx 10^(-4),),(AgI,1.0 xx 10^(-16),Ag_(2)XO_(3),8.0 xx 10^(-12),):}`
The most soluble and least soluble compounds are respectively
A. AgCl and `PbCO_94)`
B. AgI and `Ag_(2)CO_(3)`
C. AgCl and `Ag_(2)CO_(3)`
D. `Ag_(2)CO_(3)` and `PbCrO_(4)`
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Correct Answer - D
The first three salts are of the type AB for which `S= sqrt(K_(sp)) ,i.e., 10^(-5)M (AgCl), 10^(-8)M (AgI),2 xx 10^(-7) M (PbCrO_(4))` Last salt is of the type `A_(2)B` for which `S=(K_(sp)//4)^(3)=(2 xx 10^(-12))^(1//3)=10^(-4)M`. Thus most soluble is `Ag_(2)CO_(3)` and least soluble is AgI.
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