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CGP EDU Academic Team
Published on: August 14, 2026
Why Zn(II) salt is not precipitated as Zn(OH) 2 by ammonia solution in the presence of excess of ammonium chloride ?
Text Solution
Verified by ExpertsThe correct answer is:
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Zn 2+ + 2 NH 3 + 2 H 2 O 
Zn(OH) 2 ↓ + 2 NH 4 +
It is due to the lowering of OH – ion concentration because of common ion effect of NH 4 + to such a value that the K sp of Zn(OH) 2 is not attained.
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