$$K_{sp}$$ for $$A_{2}B_{3}$$ type salt (e.g.,$$Al_{2}O_{3}$$)

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$$K_{sp} = 108 \cdot S^5$$

Concept: Simplified solubility product equation for a salt that yields two cations and three anions upon dissolution.

Notation:

  • $$K_{sp}$$ = Solubility product constant;
  • $$S$$ = Molar solubility.
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