Silver Chloride Precipitation
AgNO3 + NaCl → AgCl↓ + NaNO3
Обзор
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.
Участники
| Роль | Вещество | Коэффициент | Состояние |
|---|---|---|---|
| Реагент | Silver Nitrate AgNO₃ | 1 | (aq) |
| Реагент | Sodium Chloride NaCl | 1 | (aq) |
| Продукт | Silver Chloride AgCl | 1 | (s) |
| Продукт | Sodium Nitrate NaNO₃ | 1 | (aq) |
Пример из жизни
The silver chloride test for chloride ions in water is one of the first qualitative analysis tests taught in chemistry courses.
Промышленное значение
AgCl precipitation is used in water quality testing, photography (historical), and in the preparation of silver chloride electrodes for electrochemistry.
Свойства
- Тип
- Precipitation
- Обратимая
- Нет
- Энергия
- Экзотермическая
- ΔH
- -65,5 kJ/mol
Связанные реакции
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.