Cadmium Sulfide Precipitation (Yellow)

CdCl₂ + Na₂S → CdS↓ + 2NaCl

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Sản phẩm	Sodium Chloride NaCl	2	(aq)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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

Tính chất

Loại: Precipitation
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -78,0 kJ/mol

Phản ứng liên quan

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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.