The K sp of Ag 2 CrO 4 ,   AgCl ,   AgBr and A g I are respectively, 1.1 × 10 - 12   ,   1.8 × 10 - 10   ,   5.0 × 10 - 13   ,   8.3 × 10 - 17 . Which one of the following salts will precipitate last if A g N O 3 solution is added to the solution containing equal moles of NaCl, NaI, NaBr and N a 2 C r O 4 ?

Step-by-step solution

For, Ag 2 CrO 4 ⇌ 2Ag + +CrO 4 2- solubility product K sp = ( 25 ) 2 ×5=4s 3 K sp = ( 1.1 × 10 − 12 ) S = 3 K sp 4 = 0.65 × 10 − 4 For, AgCl ⇌ Ag + +Cl - K s p = S × S ( K s p = 1.8 × 10 − 10 ) S= K sp = 1.34 × 10 − 5 For, AgBr ⇌ Ag + +Br - K sp =S×S ( K sp =5×10 -13 ) S= K s p = 0.71 × 10 − 6 For, AgI ⇌ Ag + +I - K sp =S×S ( K sp =8 .3×10 -17 ) S= K s p = 0.9 × 10 − 8 therefore, the solubility of