Analytical ChemistryHard
Question
H2S will precipitate the sulphide of all the metals from the solution of chlorides of Cu, Zn and Cd if :
Options
A.the solution is aqueous.
B.the solution is acidic.
C.the solution is slightly acidic.
D.solution is alkaline.
Solution
Sulphides of Cu, Zn and Cd will be precipitated as if the solution is aqueous/alkaline (i.e., it is does not contain any acid). S2- ion concentration obtained by H2S in aqueous/alkaline solution is sufficient to precipitate all these metals as their sulphides.
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