Analytical ChemistryMedium
Question
Why only As+3 gates precipitated as As2S3 and not Zn+2 as ZnS, when H2S is passed through an acidic solution containing As+3 and Zn+2 ?
Options
A.Solubility product of As2S3 is less than that of ZnS
B.Enough As+3 are present in acidic medium
C.Zinc salt does not ionize in acidic medium
D.Solubility product changes in presence of an acid
Solution
Ksp of As2S3 is less than ZnS. In acid medium ionization of H2S is suppressed (common ion effect) and Ksp of ZnS does not exceed.
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