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 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.