Silver Chloride Precipitation

概要

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.

参加者

日常の例

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

産業上の重要性

AgCl沈殿は水質検査、写真（歴史的）、電気化学用塩化銀電極の調製に使用される。