Question

The K_sp of Ag₂CrO₄, AgCl, AgBr and Agl are respectively, 1.1 x 10^-12,1.8, 10^-10, 5.0 x 10^-13, 8.3 x 10^-17. which one of the following salts will precipitate last if AgNO₃ solution is added to the solution containing equai moies of NaCl, NaBr, Nal and Na₂CrO₄?

(a) AgBr 

(b) Ag₂CrO₄

(c) AgI

(d) AgCl

Answer 1

The correct option is: (b) Ag₂CrO₄

Explanation:

Solubility of Ag₂CrO₄ is highest thus, it will be precipitated at last.