Write the equilibrium expression showing the dissociation of

Write the equilibrium expression showing the dissociation of Ca(OH)₂ in water. (Omit states-of-matter from your answer. )

Solution

Water is not involved in the Reaction. Its only Solvating them.

SO,

Ca(OH)2 (s) --> Ca+2 (aq) + 2 OH- (aq)

is sufficient. But 1 should keep in mind Ca(OH)2 not being very soluble; only about 1.8 g/L will dissociate.