Transcript Solubility Equilirium

Solubility Equilibrium
When a dissolved salt becomes saturated,
the solution reaches equilibrium between
the solid salt and the dissolved ions
 The solid form and the dissolved ions are
all present

Equilibrium Between Solid and It’s
Aqueous Solution
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BaSO4(s)  Ba2+(aq) + SO42-(aq)
Ksp = [Ba2+][SO42-]
Ksp – solubility product constant
Example

Write the solubility-product expression
for Ca(PO4)2
Example

Solid barium sulfate is shaken. After
several days, the value of [Ba2+] is
measured to be 1.04x10-5M. What is the
Ksp for the Ba(SO4)?
Example

Calculate the Ksp value for bismuth sulfide
(Bi2S3), which has a solubility of
1.0x10-15M.
Example

The Ksp for Cu(N3)2 is 6.3x10-10. What is
the solubility of the copper nitride in
water in grams per liter?
In general
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The greater the value of the Ksp, the
more soluble the salt is