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Will MsS be precipitated from a decimola...

Will MsS be precipitated from a decimolar solution of `Mn^(2+)` containing 0.01 M `H^+` ions by passing `H_(2)S?` Neglect hydrolysis of `S^(2-)` ions.
`K_(sp) (MnS)=1.4 xx 10^(-15), K_(H_(2)S)=1.1 xx 10^(-21)`

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The dissociation of `H_2S` is suppressed by the presence of `H^+` ions. Therefore `[S^(2-)]` in presence of `H^+` may be calculated as follows:
`H_(2)S Leftrightarrow 2H^+ +S^(2-)`
`K(H_(2)S)=([H^+] [S^(2-)])/([H_(2)S])`
`1.1 xx 10^(-21)=((0.01)^2 [S^(2-)])/(0.1) ([H_(2)S]=0.1M)`
`[S^(2-)]=1.1 xx 10^(-18)`
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