A student wants to prepared a saturated solution of Ag^(+) ion. He has got only three samples AgCI(K_(SP)=1.8xx10^(-10)). Which compound he should use to have maximum [Ag^(+)]?

A student wants to prepared a saturated solution of Ag^(+) ion. He has

1.	A student wants to prepared a saturated solution of Ag^(+) ion. He has got only three samples AgCI(K_(SP)=1.8xx10^(-10)). Which compound he should use to have maximum [Ag^(+)]?
Answer» AgCI AgBr `Ag_(2)CrO_(4)` Either of them Solution :`S_(Ag^(+))=S_(AgCI)= sqrt(K_(SP))=sqrt(1.8xx10^(-10))` `=1.34xx10^(-5)M` `S_(Ag^(+))=S_(AgBr)=sqrt(K_(SP))=sqrt(5.0xx10^(-13))` `=7.07xx10^(-7)M` `S_(Ag_(2)CrO_(4))=3sqrt((K_(SP))/(4))= 3sqrt((2.4xx10^(-12))/(4))` `= 0.8xx10^(-4)M` Also `S_(Ag^(+))=2xxS_(Ag_(2)CrO_(4))` `= 0.8xx10^(-4)xx2=1.6xx10^(-4)M` This will GIVE MAXIMUM value.