Silver Chromate Precipitation
2AgNO3 + K2CrO4 → Ag2CrO4↓ + 2KNO3
Tổng quan
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.
Người tham gia
| Vai trò | Chất | Hệ số | Trạng thái |
|---|---|---|---|
| Chất phản ứng | Silver Nitrate AgNO₃ | 2 | (aq) |
| Sản phẩm | Potassium Nitrate KNO₃ | 2 | (aq) |
Ví dụ thực tế
The Mohr titration is used to measure salt content in food, measuring chloride by adding silver nitrate until the red silver chromate endpoint appears.
Tầm quan trọng công nghiệp
The Mohr chloride titration is a standard method in water quality analysis, food science, and in the cement industry.
Tính chất
- Loại
- Precipitation
- Thuận nghịch
- Không
- Năng lượng
- Tỏa nhiệt
- ΔH
- -35,0 kJ/mol
Phản ứng liên quan
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 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.