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The `K_(sp)` of `Ag_(2)CrO_(4), AgCl, AgBr` and AgI 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, NaI and `Na_(2)CrO_(4)`A. AgClB. AgBrC. `Ag_(2)CrO_(4)`D. AgI |
Answer» Correct Answer - C `{:(K_(sp) " of " Ag_(2)CrO_(4),,= 1.1 xx 10^(-12)),(K_(sp) " of " AgCl,,= 1.8 xx 10^(-10)),(K_(sp) " of " AgBr,,= 5.0 xx 10^(-13)),(K_(sp) " of "AgI,,= 8.3 xx 10^(-17)),([Ag^(+)]^(2)[C],,= 1.1 xx 10^(-12)):}` `[Ag^(+)] = sqrt((1.1 xx 10^(-12))/([C]))` If we take [C] = 1 then the maximum requirement of `[Ag^(+)]` will be case of `Ag_(2)CrO_(4)` |
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