Solubility Product Constant

1
Solubility Product Constant

• Chemistry
• Mrs. Coyle

2
Solubility Equilibrium

• AgCl(s) ? Ag (aq) Cl- (aq)
• The concentration of AgCl (s) is constant and
  AgCl is a strong electrolyte (dissociates almost
  completely), so
• Ksp Ag Cl-
• Ksp is the solubility product constant

3
Note

• The larger the Ksp the larger the solubility of
  the compound. (This comparison can be made when
  the ion ratios are equal).
• Ex. Of the following, which is more soluble?
• AgCl Ksp 1.8x10-10
• AgI Ksp 8.3x10-17

4
Example

• Write the Ksp for
• CuS
• BaSO4
• SrCO3
• AgI