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Preciptitates
On adding NaOH some cations form precipitates of a colour that is typical to them, while most others will produce a white precipitate.
Copper (II) forms a blue precipitate:
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Silver forms a brown precipitate: |
Iron (II) forms green precipitate: |
Iron (III) forms orange precipitate:
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Al3+ Zn2+ Pb2+ Mg2+ Ba2+ all form a white precipitate: |
Sodium and Ammonium do not form precpiptates
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