A) between \[{{10}^{-8}}\] M to \[{{10}^{-7}}\]M
B) between \[{{10}^{-7}}\] M to \[{{10}^{-8}}\]M
C) \[\,>\,{{10}^{-5}}\]M
D) \[\,<\,{{10}^{-8}}\]M
Correct Answer: C
Solution :
[c] \[AB\overset{{}}{leftrightarrows}{{A}^{+}}{{B}^{-}}\] \[{{K}_{sp}}=\frac{[{{A}^{+}}]\,[{{B}^{-}}]}{[AB]}\] Salt will precipitate if ionic conc.\[>{{K}_{SP}}\] \[[{{A}^{+}}][{{B}^{-}}]>1\times {{10}^{-8}}\] \[(1\times {{10}^{-3}})[{{B}^{-}}]>1\times {{10}^{-8}}\] \[[{{B}^{-}}]>\frac{1\times {{10}^{-8}}}{1\times {{10}^{-3}}}\] or \[1\times {{10}^{-5}}\]You need to login to perform this action.
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