Silver Chloride Precipitation

AgNO3 + NaCl → AgCl↓ + NaNO3

概述

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.

参与者

角色 物质 系数 状态
反应物 Silver Nitrate AgNO₃ 1 (aq)
反应物 Sodium Chloride NaCl 1 (aq)
产物 Silver Chloride AgCl 1 (s)
产物 Sodium Nitrate NaNO₃ 1 (aq)

日常示例

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

工业重要性

氯化银沉淀反应用于水质检测、污染物分析和银的重量分析法，是分析化学的基础反应之一。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-65.5 kJ/mol

相关反应

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.