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The K(sp) of CuS, Ag(2)S and HgS are 10^...

The `K_(sp)` of CuS, `Ag_(2)S` and `HgS` are `10^(-31), 10^(-44)` and `10^(-54)` respectively. The solubility of these sulphides are in the order.

A

`Ag_(2)SgtHgSgtCuS`

B

`HgSgtCuSgtAg_(2)S`

C

`HgSgtAg_(2)SgtCuS

D

`Ag_(2)SgtCuSgtHgS`

Text Solution

Verified by Experts

The correct Answer is:
D
`Ag_(2)SgtCuSgtHgS`
Solubility of `CuS==sqrt(10^(-31))=3.16xx10^(-16)mol//L`
Solubility of `Ag_(2)S`
`==3sqrt(K_(sp)/(4))=3sqrt(10^(-42)/(4))=6.3xx10^(-5)mol//L`
Solubility of `HgS=sqrt(K_(sp))=sqrt(10^(-54))`
`=10^(-27)mol//L`
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