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cation analysis - Coggle Diagram

- - - - soluble in excess
        
        nh3
        
        gelatinous white ppt
        
        insoluble in excess
        
        aluminium 3+
        
        soluble in excess
        
        zinc 2+
    - - insoluble in excess
        
        nh3
        
        no ppt/ faint
        
        insoluble in excess
        
        barium 2+
    - - insoluble in excess
        
        nh3
        
        no ppt
        
        calcium 2+
    - - nh3
        
        white ppt
        
        insoluble in excess
        
        magnesium 2+
    - - insoluble in excess
        
        nh3
        
        off-white ppt quickly turning brown on contact with air
        
        insoluble in excess
        
        manganese 2+
  - - - heat
        
        ammonia gas
        
        ammonium +
        
        turns red litmus blue
  - - - dissolves in excess giving clear green solution
        
        nh3
        
        (light) grey-green ppt
        
        insoluble in excess
        
        chromium 3+
    - - insoluble in excess
        
        nh3
        
        (pale) blue ppt
        
        dissolves in excess giving dark blue solution
        
        copper 2+
    - - insoluble in excess
        
        nh3
        
        dark-green ppt turning brown on contact with air
        
        insoluble in excess
        
        iron 2+
    - - insoluble in excess
        
        nh3
        
        red-brown/ orange ppt
        
        insoluble in excess
        
        iron 3+