InterviewSolution
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InterviewSolution
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A solution of `Na_(2)CO_(3)` is added drop by drop to litre of a solution containing `10^(-4)` mole of `Ba^(2+)` and `10^(-5)` mole of Ag, if `K_(SP)` for `BaCO_(3)` is `8.1xx10^(-9)` and `K_(SP)` for `Ag_(2)CO_(3)is 6.9xx10^(-12)`, then which is not true ?A. No precipitate of `BaCO_(3)` will appear untill `[CO_(3)^(2-)]` reaches `8.1xx10^(-5)` mole per litreB. A precipitate of `Ag_(2)CO_(3)` will appear when `[CO_(3)^(2-)]` reaches `6.9xx10^(-5)` mol `litre^(-1)`C. No precipitate of `Ag_(2)CO_(3)` will appear until `[CO_(3)^(2-)]` reaches `6.9xx10^(-2)` mol per litreD. `BaCO_(3)` will be precipitated first |
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Answer» Correct Answer - B For precipitation of `Ag_(2)CO_(3)`, `[CO_(3)^(2-)]= (K_(SP))/([Ag^(+)]^(2)) = (6.9xx10^(-12))/([10^(-5)]^(2))` `=6.9xx10^(-2)` and for precipitation of `BaCO_(3)`, `[CO_(3)^(2-)]= (K_(SP))/([Ba^(2+)])= (8.1xx10^(-9))/(10^(-4))=8.1xx10^(-5)` |
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