Cadmium Sulfide Precipitation (Yellow)

CdCl₂ + Na₂S → CdS↓ + 2NaCl

Aperçu

Cadmium chloride reacts with sodium sulfide to form a bright yellow precipitate of cadmium sulfide (Ksp = 8 × 10⁻²⁷). CdS is known as cadmium yellow and was historically an important artist's pigment. The brilliant yellow color is due to its 2.4 eV bandgap.

Participants

Rôle	Substance	Coefficient	État
Produit	Sodium Chloride NaCl	2	(aq)

Exemple du quotidien

Many of Claude Monet's and Vincent van Gogh's paintings feature cadmium yellow pigment, prized for its brilliance and light-fastness.

Importance industrielle

CdS is used as a pigment, in photocells and light meters, in thin-film solar cells (CdTe/CdS), and as a quantum dot material.

Propriétés

Type: Precipitation
Réversible: Non
Énergie: Exothermique
ΔH: -78,0 kJ/mol

Réactions associées

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

Frequently Asked Questions

What is the equation for Cadmium Sulfide Precipitation (Yellow)?

The balanced equation is: CdCl₂ + Na₂S → CdS↓ + 2NaCl.

What type of reaction is Cadmium Sulfide Precipitation (Yellow)?

Cadmium Sulfide Precipitation (Yellow) is a precipitation reaction.

Is Cadmium Sulfide Precipitation (Yellow) exothermic or endothermic?

Cadmium Sulfide Precipitation (Yellow) is exothermic (releases energy). The enthalpy change (ΔH) is -78.0 kJ/mol.