Cadmium Sulfide Precipitation (Yellow)

CdCl2 + Na2S → CdS↓ + 2NaCl

概述

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.

参与者

角色 物质 系数 状态
产物 Sodium Chloride NaCl 2 (aq)

日常示例

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

工业重要性

CdS用作颜料、光电池和光度计、薄膜太阳能电池(CdTe/CdS),以及量子点材料。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-78.0 kJ/mol

相关反应

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.