In the solubility rules, Mg(OH) 2 was listed as an “insoluble” salt. It is actually slightly soluble in an equilibrium reaction:

In the solubility rules, Mg(OH)2was listed as an “insoluble” salt.

It is actually slightly soluble in anequilibriumreaction:

Mg(OH)2(s) ⇌ Mg2+(aq) + 2OH-(aq)

The equilibrium constant, Ksp, for this reaction at 25oC is 1.2 x 10-11.

What is the equilibrium concentration of Mg2+at 25oC?

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