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Why only As^(+3) gets precipitated as As...

Why only `As^(+3)` gets precipitated as `As_(2)S_(3)` and not `Zn^(+2)` as ZnS when `H_(2)S` is passed through an acidic soluiotn containing `As^(+3)` and `Zn^(+2)` ?

A

Solubility product of `As_(2)S_(3)` is less than that of ZnS

B

Enough `As^(+3)` are present in acidic medium

C

Zinc salt does not ionise in acidic medium

D

Solubility product changes in presence of an acid.

Text Solution

Verified by Experts

The correct Answer is:
A
This is because `K_(sp)` of `As_(2)S_(3) lt ZnS`.
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