20.4 The Common Ion Effect in Solubility Products (Video)
- Page ID
- 342612
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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
The presence of a common ion greatly decreases the solubility of a salt.
For the solubility of insoluble salt CaF2(s).
CaF2(s) ⇔ Ca2+(aq) + 2 F-(aq)
The common ions are Ca2+ and F-. These can be introduced as a soluble salt such as Ca(NO3)2(s) or NaF(s).
If we add a NaF(aq) solution to a saturated solution of CaF2(aq) we are adding F-(aq) to the equilibrium.
Le Chatlier’s principal says the equilibrium will shift left.
This means that solid CaF2(s) will form (Precipitate) and the {Ca2+} will decreases.
This video contains examples of determining the solubility of a salt (s) if given the solubility product (Ksp) and the concentration of a common ion of the salt.
Link to Video
The Common Ion Effect in Solubility Products: https://youtu.be/_P3wozLs0Tc
Attribution
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Prof. Steven Farmer (Sonoma State University)