Write the ion-product expressions for a) iron(III) hydroxide b) barium phosphate c) magnesium fluoride

Ksp = [Fe³⁺].[OH⁻]³

Ksp = [Ba²⁺]³.[PO₄³⁻]²

Ksp = [Mg²⁺].[F⁻]²

Explanation:

a) Let's write the reaction for the solution of iron(III) hydroxide.

Fe(OH)₃(s) ⇄ Fe³⁺(aq) + 3 OH⁻(aq)

The solubility product constant is:

Ksp = [Fe³⁺].[OH⁻]³

b) Let's write the reaction for the solution of barium phosphate.

Ba₃(PO₄)₂(s) ⇄ 3 Ba²⁺(aq) + 2 PO₄³⁻(aq)

The solubility product constant is:

Ksp = [Ba²⁺]³.[PO₄³⁻]²

c) Let's write the reaction for the solution of magnesium fluoride.

MgF₂(s) ⇄ Mg²⁺(aq) + 2 F⁻(aq)

The solubility product constant is:

Ksp = [Mg²⁺].[F⁻]²

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