Silver Chloride Precipitation

AgNO3 + NaCl → AgCl↓ + NaNO3

개요

Silver nitrate reacts with sodium chloride to form a white curdy precipitate of silver chloride. AgCl has a very low Ksp of 1.8 × 10⁻¹⁰, making it essentially insoluble. The precipitate turns purple in light due to photodecomposition of AgCl to silver metal and chlorine. This is the basis of the chloride ion test.

참여 물질

역할 물질 계수 상태
반응물 Silver Nitrate AgNO₃ 1 (aq)
반응물 Sodium Chloride NaCl 1 (aq)
생성물 Silver Chloride AgCl 1 (s)
생성물 Sodium Nitrate NaNO₃ 1 (aq)

일상 속 예시

The silver chloride test for chloride ions in water is one of the first qualitative analysis tests taught in chemistry courses.

산업적 중요성

AgCl 침전은 수질 시험, 사진(역사적), 그리고 전기화학용 염화은 전극 제조에 사용됩니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-65.5 kJ/mol

관련 반응

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Fluoride Precipitation (Fluorite) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Silver Chloride Precipitation?
The balanced equation is: AgNO₃ + NaCl → AgCl↓ + NaNO₃.
What type of reaction is Silver Chloride Precipitation?
Silver Chloride Precipitation is a precipitation reaction.
Is Silver Chloride Precipitation exothermic or endothermic?
Silver Chloride Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -65.5 kJ/mol.