20.10 Solubility of Complex Ions (Video)
- Page ID
- 342608
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This project was preformed to supply Libretext Authors with videos on General Chemistry topics which can be used to enhance their projects. Also, these videos are meant to act as a learning resource for all General Chemistry students.
Video Topics
Complex ions: Another way to dissolve partially soluble salts is by forming a complex.
A complex ion is a polyatomic cation or anion composed of a central metal ion to which other groups called ligands are bonded.
For [Fe(CN)6]4-(aq)
Fe2+ is the central ion and -CN is the ligand
The equilibrium constant for creating a complex ion is called a formation constant (Kf)
Fe2+(aq) + 6 -CN(aq) ⇔ [Fe(CN)6]4-(aq)
Kf = 1 x 1037
Because Kf is very large the equilibrium lies far to the right.
Because the complex ion is charged, it is usually water-soluble.
This video contains examples, which shows how the formation of a complex can cause an insoluble salt to dissolve. Also, the concentration of a metal cation after complexation is calculated.
Link to Video
Solubility of Complex Ions: https://youtu.be/f4pkKDg2XTA
Attribution
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Prof. Steven Farmer (Sonoma State University)