Recall that Ksp is an equilibrium constant related to slightly soluble ionic compounds.
The dissociation of slightly soluble Al(OH)3 in solution is as follows:
Al(OH)3(s) ⇌ Al3+(aq) + 3 OH–(aq)
We can construct an ICE table for this dissociation.
where x = molar solubility of the compound.
The Ksp expression is:
Remember that solids are ignored in the ICE table and Ksp expression.
Enter the solubility-product expression for Al(OH)3(s).