Zinc Sulfide Precipitation

ZnSO₄ + Na₂S → ZnS↓ + Na₂SO₄

Aperçu

Zinc sulfate reacts with sodium sulfide to form a white precipitate of zinc sulfide (Ksp = 2 × 10⁻²⁵). ZnS occurs naturally as the mineral sphalerite, the most important zinc ore. Zinc sulfide phosphors are used in cathode ray tubes and luminous paints.

Participants

Rôle	Substance	Coefficient	État
Réactif	Zinc Sulfate ZnSO₄	1	(aq)
Produit	Sodium Sulfate Na₂SO₄	1	(aq)

Exemple du quotidien

Glow-in-the-dark toys and watch dials often use zinc sulfide phosphors doped with copper, which glow green after light exposure.

Importance industrielle

Sphalerite (ZnS) is the world's most important zinc ore. ZnS phosphors are used in display technology, X-ray screens, and luminescent coatings.

Propriétés

Type: Precipitation
Réversible: Non
Énergie: Exothermique
ΔH: -65,0 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 Zinc Sulfide Precipitation?

The balanced equation is: ZnSO₄ + Na₂S → ZnS↓ + Na₂SO₄.

What type of reaction is Zinc Sulfide Precipitation?

Zinc Sulfide Precipitation is a precipitation reaction.

Is Zinc Sulfide Precipitation exothermic or endothermic?

Zinc Sulfide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -65.0 kJ/mol.