Cadmium Sulfide Precipitation (Yellow)

CdCl₂ + Na₂S → CdS↓ + 2NaCl

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Produto	Sodium Chloride NaCl	2	(aq)

Exemplo do cotidiano

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

Importância industrial

O CdS é utilizado como pigmento, em fotocélulas e medidores de luz, em células solares de película fina (CdTe/CdS) e como material para pontos quânticos.

Propriedades

Tipo: Precipitation
Reversível: Não
Energia: Exotérmico
ΔH: -78,0 kJ/mol

Reações relacionadas

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.