염화은 침전

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 질산은 AgNO₃ 1 (aq)
반응물 염화나트륨 NaCl 1 (aq)
생성물 염화은 AgCl 1 (s)
생성물 질산나트륨 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.

자주 묻는 질문

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