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light blue precipitate will be formed which is insoluble in excess sodium hydroxide .
- aqueous ammonia
light blue precipitate will be formed which is soluble in excess aqueous ammonia to form a deep
blue solution .
conclusion : Cu2+ is present , light blue precipitate is copper(II) hydroxide
iron (II) ion - sodium hydroxide ( NaOH )aq
green precipitate will be formed which is insoluble in excess sodium hydroxide
- aqueous ammonia (NH4OH)
~ in excess sodium hydroxide
conclusion : Fe2+ is present , green precipitate is iron(II) hydroxide
Iron (III) ion - sodium hydroxide ( NaOH )aq
reddish brown precipitate will be formed which is insoluble in excess sodium hydroxide .
- aqueous ammonia (NH4OH) aq
~ in excess aqueous ammonia
conclusion : Fe3+ is present , reddish brown precipitate is iron (III) hydroxide
zinc ionZn2+ : sodium hydroxide
white precipitate will be formed which is soluble in excess sodium hydroxide to form a colourless solution
aqueous ammonia
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