Cadmium Sulfide Precipitation (Yellow)

CdCl2 + Na2S → CdS↓ + 2NaCl

개요

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.

참여 물질

역할 물질 계수 상태
생성물 Sodium Chloride NaCl 2 (aq)

일상 속 예시

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

산업적 중요성

CdS는 안료, 광전지와 광도계, 박막 태양 전지(CdTe/CdS), 그리고 양자점 재료로 사용됩니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-78.0 kJ/mol

관련 반응

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.