Qualitative Analysis | Test for Cations

Qualitative Analysis | Test for Cations

zinc ion	A white precipitate which is soluble in excess of sodium hydroxide to form a colourless solution.	A white precipitate which is soluble in excess of aqueous ammonia.
aluminium  ion	A white precipitate which is soluble in excess of sodium hydroxide to form a colourless solution.	A white precipitate which is insoluble in excess of aqueous ammonia.
lead(II) ion	A white precipitate which is soluble in excess of sodium hydroxide to form a colourless solution.	A white precipitate which is insoluble in excess of aqueous ammonia.
calcium ion	A white precipitate which is insoluble in excess of sodium hydroxide.	No visible colour change; the solution remains colourless.
iron (II) ion
iron (III) ion
copper (II) ion	A blue precipitate which is insoluble in excess of sodium hydroxide.	A blue precipitate which is soluble in excess of aqueous ammonia to form a dark blue solution.
ammonium ion	No precipitate formed. Gas evolved on warming turns damp red litmus paper blue.	No visible colour change; the solution remains colourless.