Question

There is solution containing 0.2M Ni2+ and 0.2M Cd2+ , which is saturated with H2S. How...

There is solution containing 0.2M Ni2+ and 0.2M Cd2+ , which is saturated with H2S.
How much concentration [H+] can make CdS precipitate but not Nis ?
Ans: 0.086
Please help ! Thanks !
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Homework Answers

Answer #1

when hydrogen sulfide gas is added to a solution of cadmium nitrate.

The solubility product of the Cds is less than that of Nis and hence Cds is precipitated while Nis does not precipitate at acidic conditions.

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