20.3 Finding Ksp from Ion Concentrations (Video)
- Page ID
- 342611
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Video Topics
If this concentration of an insoluble salt’s ions in a saturated solution is know, the Ksp of the salt can be calculated.
A saturated solution of PbI2(s) was shown to have a {I-} = 2.4 x 10‑3 M. What is Ksp for PbI2(s)?
PbI2(s) « Pb2+(aq) + 2 I-(aq)
-s s 2s
{I-} = 2s = 2.4 x 10‑3 M
{I-}/2 = s
s = 1.2 x 10-3 M
Ksp = {Pb2+}{I-}2 = (s)(2s)2
Ksp = 4s3 = 4(1.2 x 10‑3)3
Ksp = 6.9 x 10‑9
Link to Video
Finding Ksp from Ion Concentrations: https://youtu.be/a8nhlJk8UX0
Attribution
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Prof. Steven Farmer (Sonoma State University)