Question

The `K_(sp)` of `Ag_(2)CrO_(4),AgCl,AgBr` and AgI are respectively, `1.1xx10^(-12),1.8xx10^(-10),5.0xx10^(-13),8.3xx10^(-17)`. Which one of the following salts will precipitate last if `AgNO_(3)` solution is added to the solution containing equal moles of NaCl,NaBr,NaI and `Na_(2)CrO_(4)` ?
A. `AgBr`
B. `Ag_(2)CrO_(4)`
C. `Agl`
D. `AgCI.`

Answer 1

Correct Answer - B
the salt with maxium `K_(sp)` value will be precipitated last.
Therefore `AgCI (K_(sp) = 1.8 xx 10^(-10))` will be precipitated last .