Silver Chloride Precipitation
AgNO3 + NaCl → AgCl↓ + NaNO3
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
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Silver Nitrate AgNO₃ | 1 | (aq) |
| 反応物 | Sodium Chloride NaCl | 1 | (aq) |
| 生成物 | Silver Chloride AgCl | 1 | (s) |
| 生成物 | Sodium Nitrate NaNO₃ | 1 | (aq) |
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。
特性
- タイプ
- Precipitation
- 可逆的
- いいえ
- エネルギー
- 発熱性
- ΔH
- -65.5 kJ/mol
関連する反応
Aluminum Hydroxide Precipitation
Barium Sulfate Precipitation
Cadmium Sulfide Precipitation (Yellow)
Calcium Phosphate Precipitation (Bone Mineral)
Chromium(III) Hydroxide Precipitation
Lead Carbonate Precipitation
Magnesium Hydroxide Precipitation
Copper Sulfide Precipitation
Cobalt(II) Hydroxide 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.