Silver Chromate Precipitation

2AgNO3 + K2CrO4 → Ag2CrO4↓ + 2KNO3

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Silver Nitrate AgNO₃ 2 (aq)
생성물 Potassium Nitrate KNO₃ 2 (aq)

일상 속 예시

The Mohr titration is used to measure salt content in food, measuring chloride by adding silver nitrate until the red silver chromate endpoint appears.

산업적 중요성

Mohr 염화물 적정은 수질 분석, 식품 과학, 그리고 시멘트 산업의 표준 방법입니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-35.0 kJ/mol

관련 반응

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.