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Amanat Grade: 12th pass
        
. From the acidic solution containing copper (+2) and zinc (+2) ions, copper can be selectively precipitated using sodium sulphide.
3 years ago

Answers : (1)

Kevin Nash
askIITians Faculty
332 Points
										True
: K
base sp of CuS is less than K base sp of ZnS. On passing H base 2S in acidic
medium, the dissociation of H base 2S is suppressed due to common ion effect
and it provides [S^2-] which is just suffi-cient to cross over K base sp of CuS
and not K base sp fo ZnS. Thus only CuS gets precipitated.
										
3 years ago
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