question_answer

Solid \[AgN{{O}_{3}}\] is slowly added to a solution containing each of 0.01M \[NaCl\] and 0.001 M \[NaBr.\] What will be the concentration of \[{{C}^{-}}\] ions in solution when \[AgBr\] will just start to precipitate? \[{{K}_{sp}}(AgBr)=3.6\times {{10}^{-13}},{{K}_{sp}}(AgCl)=1.8\times {{10}^{-10}}.\]

A) \[1.8\times {{10}^{-7}}\]         

B) \[3.6\times {{10}^{-10}}\]

C) 0.01                             

D) \[2\times {{10}^{-4}}\]