Department of Chemistry and Chemical Biology

PPT Slide

    Factors That Affect Solubility

    Common-Ion Effect
  • Solubility is decreased when a common ion is added.
  • This is an application of Le Châtelier’s principle:
  • as F- (from NaF, say) is added, the equilibrium shifts away from the increase.
  • Therefore, CaF2(s) is formed and precipitation occurs.
  • As NaF is added to the system, the solubility of CaF2 decreases.

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Last modified: Tuesday, April 01, 2003