First slide

Solubility product(KSP)

Question

Statement I : In presence of dilute HCl, Zn²⁺ is not precipitated by S^2– ions.
Statement II : The dissociation of H₂S is suppressed by addition of dilute HCl.

Easy

A

Statement I and II are correct
B

Statement I is correct and Statement II is incorrect
C

Statement - I is incorect and Statement II is correct
D

Both statement - I and statement - II are False

Solution

Solubility of ZnS is relatively higher than the sulphides of group II. So a high concentration of S^-2 ions is required to cause the precipitation. If HCl is already present then the dissociation of H₂S will be greatly suppresed due to common ion effect. As a result enought S^-2 ions are not there to cause the precipitation.

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