Cards (29)

  • [Cu(H2O)₆]²⁺
    pale blue : from CuSO₄ .5H₂O
  • Cu(OH)₂
    Pale blue precipitate : NH₃ added dropwise
  • [Cu(NH₃)₄(H2O)₂]²⁺
    Deep/Dark blue : excess NH₃
  • CuCl₄ ² ⁻
    Yellow : excess HCl
  • Cu⁺
    White precipitate : reduction of Cu ²⁺ with I⁻
  • Cu
    brown solid
  • Cu ²⁺
    Brown solid (Cu) and blue solution (CuSO4)
  • CoCl₄ ²⁻
    1. From CoCl2.6H2O plus water and excess HCl
    2. Blue
  • [Cr(H2O)6]3+
    Pale purple
  • [Cr(H2O)6]3+
    1. From K2CrO4.12H2O
    2. Pale purple
    3. Heat-green
  • Cr(OH)3(s)
    Dark green precipitate
  • Cr(OH)₃ (s)
    Dark green precipitate : NH₃ dropwise
  • [Cr(NH₃)₆]³⁺
    Purple : excess NH₃
  • [Cr(OH)₆] ³⁻
    Dark green : excess OH- to Cr(OH)₃ (s)
  • Cr₂O₇ ²⁻
    Orange : from K₂Cr₂O₇ (s) in 0.1 moldm⁻³ H₂SO₄
  • CrO₄²⁻
    Yellow : oxidation of Cr³⁺ with hot alkaline H₂O₂
  • [Mn(H₂O)₆]²⁺
    Pale pink : from MnSO₄ .4H₂O
  • Mn(OH)₂ (s)
    Pale brown precipitate : OH- added dropwise
  • [Fe(H₂O)₆]²⁺
    Pale green : from FeSO₄ . 7H₂O (s)
  • Fe(OH)₂(s)
    Dark green precipitate: OH- dropwise
  • [Fe(H₂O)₆] ³⁺
    Yellow : from FeCl₃ . 6H₂O (s)
  • Fe(OH)₃ (s)
    Orange-brown precipitate : OH- added dropwise
  • Fe(OH)3(s)
    1. NaOH dropwise to Fe(aq)
    2. Orange-brown precipitate
  • MnO₄⁻
    Purple
  • I⁻/Fe³⁺ —> I₂/Fe²⁺
    Orange brown (Fe³⁺ ) to brown (I₂)
  • Cu ²⁺
    blue
  • Mn²⁺
    pale pink
  • CoCl₄ ²⁻
    blue : CoCl₂ . 6H₂O (s) with water and excess HCl
  • [Cr(H₂O)₆]³⁺
    pale purple when heated it turns green due to impurities
    • from KCr(SO₄)₂ .12H₂O (s)