Copper - Light blue ppt, insoluble in excess, Chromium - Green/grey ppt that is soluble in excess to give green solution, Iron(II) - Green-grey ppt that is insoluble in excess, Iron(III) - Red-brown ppt, insoluble in excess, Aluminium - White ppt, soluble in excess, Calcium - White ppt, insoluble in excess,

Cation testing with NaOH

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