Transition Metal Complexes
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Chemical Concept Demonstrated
- Nickel
- Cobalt
- Iron
- Chromium
- Copper
- Prepare a saturated solution of the Cu2+ ion in concentrated HCl and note the green color of the solution due to the presence of the CuCl42- ion.
- Pour 20 mL of the CuCl42- ion solution into 200 mL of water and note the formation of the light blue Cu(H2O)62+ complex.
- Add 6 M NH3 drop by drop to a fresh solution of the Cu2+ ion until Cu(OH)2 precipitates.
- Continue adding 6 M NH3 until the solution turns the deep blue color of the Cu(NH3)42+ ion.
- Copper
- Chromium
- Iron
- Cobalt