황화카드뮴 침전 (노랑)
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 | 염화나트륨 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
- 침전
- 가역 반응
- 아니오
- 에너지
- 발열
- ΔH
- -78.0 kJ/mol
자주 묻는 질문
What is the equation for 황화카드뮴 침전 (노랑)?
The balanced equation is: CdCl₂ + Na₂S → CdS↓ + 2NaCl.
What type of reaction is 황화카드뮴 침전 (노랑)?
황화카드뮴 침전 (노랑) is a 침전 reaction.
Is 황화카드뮴 침전 (노랑) exothermic or endothermic?
황화카드뮴 침전 (노랑) is exothermic (releases energy). The enthalpy change (ΔH) is -78.0 kJ/mol.