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Question
Identify the cation of the following case:
NH4OH solution when added to solution (B) gives white ppt. which does not dissolve in excess.
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Solution
Pb2+ ion :
\[\ce{Pb(NO3)2 + 2NH4OH -> \underset{\text{(chalky white ppt. insoluble in excess)}}{Pb(OH)2 + 2NH4NO3}}\]
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