20.2 Finding the Solubility of a Salt (Video)
- Page ID
- 342610
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Video Topics
The Ksp expression can be used to find the molar solubility of a salt (s). From this, the concentration of the insoluble salt’s ions in a saturated solution can be determined.
For a saturated solution of CaF2(s), find the molar solubility if Ksp = 5.3 x 10-9. Also, find {Ca2+} and {F-} at equilibrium.
CaF2(s) ⇔ Ca2+(aq) + 2 F-(aq)
- s s 2 s
Ksp = {Ca2+}{F-}2 = {s}{2s}2 = 4s3
Ksp = 4s3
s = (5.3 x 10-9/4)1/3 = 1.1 x 10-3 M
{Ca2+} = s = 1.1 x 10-3 M
{F-} = 2 s = 2.2 x 10-3 M
This video contains examples of determining the solubility of a salt (s) if given the solubility product (Ksp)
Link to Video
Finding the Solubility of a Salt: https://youtu.be/98BuldrICXM
Attribution
-
Prof. Steven Farmer (Sonoma State University)