On adding ammonium hydroxide, a white precipitate soluble in excess of ammonium hydroxide indicates Zn2+ and a white precipitate insoluble in excess of ammonium hydroxide indicates Pb2+
On adding ammonium hydroxide, a white precipitate soluble in excess of ammonium hydroxide indicates Zn2+ and a white precipitate insoluble in excess of ammonium hydroxide indicates Pb2+
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