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QA (CH11) - Coggle Diagram

- - - - NaOH (aq)
        
        Dropwise
        
        Forms white precipitate of Zn(OH)2
        
        In excess
        
        Precipitate dissolvesin excess to form colourless solution
      - NH3 (aq)
        
        Dropwise
        
        Forms white precipitate of Zn(OH)2
        
        In excess
        
        Precipitate dissolvesin excess to form colourless solution
    - - NaOH (aq)
        
        In excess
        
        Precipitate dissolves in excess to form colourless solution
        
        Dropwise
        
        Forms white precipitate of Al(OH)3
      - NH3 (aq)
        
        Dropwise
        
        Forms white precipitate of Al(OH)3
        
        In excess
        
        Precipitate is insoluble in excess
    - - NaOH (aq)
        
        Dropwise
        
        Forms white precipitate of Ca(OH)2
        
        In excess
        
        Precipitate is insoluble in excess
      - NH3 (aq)
        
        In excess
        
        No observable change
        
        Forms white precipitate of Al(OH)3
        
        Dropwise
        
        No precipitate is formed
  - - - Dropwise
        
        No precipitate
        
        On heating, NH3 gas is given off,
        turning damp red litmus paper blue
        (similar to nitrate test, but no aluminium)
        
        NH3 + H2O <--> NH4+ + OH-
      - In excess
        
        No change is observed
    - - No reaction
  - - - NaOH (aq)
        
        Dropwise
        
        Forms a light blue precipitate of Cu(OH)2
        
        In excess
        
        Precipitate is insoluble in excess
      - NH3 (aq)
        
        Dropwise
        
        Forms a light blue precipitate of Cu(OH)2
        
        In excess
        
        Precipitate dissolves in excess to form a dark blue solution
    - - NaOH (aq)
        
        Dropwise
        
        Forms a green precipitate of Fe(OH)2
        
        In excess
        
        Precipitate is insoluble in excess, turns brown on standing.
      - NH3 (aq)
        
        Dropwise
        
        Forms a green precipitate of Fe(OH)2
        
        In excess
        
        Precipitate is insoluble in excess, turns brown on standing.
    - - NaOH (aq)
        
        Dropwise
        
        Forms a RED-BROWN precipitate of Fe(OH)3
        
        In excess
        
        Precipitate is insoluble in excess
      - NH3 (aq)
        
        Dropwise
        
        Forms a RED-BROWN precipitate of Fe(OH)3
        
        In excess
        
        Precipitate is insoluble in excess