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The sulphide ion concentration [S^(2-)] ...

The sulphide ion concentration `[S^(2-)]` in saturated `H_(2)S` solution is `1xx10^(-22)`. Which of the following sulphides should be quantitavely precipitated by `H_(2)S` in the presence of dil. `HCl`?
`{:("Sulphide",,"Solubility Product"),((I),,1.4xx10^(16)),((II),,1.2xx10^(-22)),((III),,8.2xx10^(-46)),((IV),,5.0xx10^(-34)):}`

A

`I`,`II`

B

`III`,`IV`

C

`II`,`III`,`IV`

D

Only `I`

Text Solution

Verified by Experts

The correct Answer is:
B
Basic radicals of groups `II` and `IV` are precipitated by `H_(2)S` in the form of their sulphides. Second group in acidic ,medium and fourth group in alkaline medium. They precipitate when ionic product is more than solubility product.
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Knowledge Check

  • The sulphide ion concentration [S^(2-)] in saturated H_(2)S solution is 1 xx 10^(-22) . Which of the following sulphides should be quantitatively precipitated by H_(2)S in the presence of dil. HCl {:("Sulphide",,"Solubility Product"),("(I)",,1.4xx10^(-16)),("(II)",,1.2xx10^(-22)),("(III)",,8.2xx10^(-46)),("(IV)",,5.0xx10^(-34)):}

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