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C9 (Testing for gases, Testing for carbonates, halides and sulphates,…

- - - - Aluminum/calcium/magnesium:
        
        White precipitate (Dissolves/disappears with excess NaOH)
      - Copper (II) (Cu2+) Ions
        
        Blue precipitate
      - Iron (II)
        
        (Fe2+) Ions green precipitate
      - Iron (III) (Fe3+) ions
        
        Brown percipitate