Magnesium Hydroxide Precipitation

MgCl₂ + 2NaOH → Mg(OH)₂↓ + 2NaCl

Aperçu

Magnesium chloride reacts with sodium hydroxide to form a white precipitate of magnesium hydroxide (Ksp = 5.6 × 10⁻¹²). The milky white suspension is commonly known as milk of magnesia. Mg(OH)₂ is a weak base that slowly neutralizes acid.

Participants

Rôle	Substance	Coefficient	État
Réactif	Sodium Hydroxide NaOH	2	(aq)
Produit	Magnesium Hydroxide Mg(OH)₂	1	(s)
Produit	Sodium Chloride NaCl	2	(aq)

Exemple du quotidien

Milk of magnesia antacid is a suspension of this precipitate that neutralizes stomach acid gradually and acts as a gentle laxative.

Importance industrielle

Magnesium hydroxide is used as an antacid, flame retardant (replacing halogenated compounds), and in wastewater treatment for heavy metal removal.

Propriétés

Type: Precipitation
Réversible: Non
Énergie: Exothermique
ΔH: -41,0 kJ/mol

Réactions associées

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Fluoride Precipitation (Fluorite) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Magnesium Hydroxide Precipitation?

The balanced equation is: MgCl₂ + 2NaOH → Mg(OH)₂↓ + 2NaCl.

What type of reaction is Magnesium Hydroxide Precipitation?

Magnesium Hydroxide Precipitation is a precipitation reaction.

Is Magnesium Hydroxide Precipitation exothermic or endothermic?

Magnesium Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -41.0 kJ/mol.