Silver Chromate Precipitation
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2AgNO3 + K2CrO4 → Ag2CrO4↓ + 2KNO3
概述
Silver nitrate reacts with potassium chromate to form a brick-red precipitate of silver chromate (Ksp = 1.1 × 10⁻¹²). This reaction is the basis of the Mohr method for determining chloride concentration by titration with AgNO₃ using K₂CrO₄ indicator.
参与者
| 角色 | 物质 | 系数 | 状态 |
|---|---|---|---|
| 反应物 | Silver Nitrate AgNO₃ | 2 | (aq) |
| 产物 | Potassium Nitrate KNO₃ | 2 | (aq) |
日常示例
The Mohr titration is used to measure salt content in food, measuring chloride by adding silver nitrate until the red silver chromate endpoint appears.
工业重要性
Mohr法氯化物滴定是水处理厂和环境检测实验室测定氯离子浓度的标准分析方法。
属性
- 可逆
- 否
- 能量
- 放热
- ΔH
- -35.0 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 Chromate Precipitation?
The balanced equation is: 2AgNO₃ + K₂CrO₄ → Ag₂CrO₄↓ + 2KNO₃.
What type of reaction is Silver Chromate Precipitation?
Silver Chromate Precipitation is a precipitation reaction.
Is Silver Chromate Precipitation exothermic or endothermic?
Silver Chromate Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -35.0 kJ/mol.