The K_(sp) of Ag_2CrO_4, AgCl, AgBr and Agl are respectively, 1.1 xx 10^(-12), 1.8 xx 10^(-10), 5.0 xx 10^(-13), 8.3 xx 10^(-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, Nal andNa_2CrO_4 ?

The K_(sp) of Ag_2CrO_4, AgCl, AgBr and Agl are respectively, 1.1 xx 1

1.	The K_(sp) of Ag_2CrO_4, AgCl, AgBr and Agl are respectively, 1.1 xx 10^(-12), 1.8 xx 10^(-10), 5.0 xx 10^(-13), 8.3 xx 10^(-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, Nal andNa_2CrO_4 ?
Answer» AgI AgCl AgBr `Ag_2CrO_4` Solution :`Ag_2CrO_4 to K_(sp)=[Ag^+]^2 [CrO_4^(-2)]` `rArr [Ag^+]=SQRT(K_(sp)/[CrO_4^(-2)])=sqrt((1.1xx10^(-12))/[CrO_4^(-2)])`=MAXIMUM