Silver Chromate Precipitation

2AgNO₃ + K₂CrO₄ → Ag₂CrO₄↓ + 2KNO₃

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Silver Nitrate AgNO₃	2	(aq)
Produto	Potassium Nitrate KNO₃	2	(aq)

Exemplo do cotidiano

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

Importância industrial

A titulação de Mohr para cloreto é um método padrão na análise de qualidade da água, ciência alimentar e na indústria cimenteira.

Propriedades

Tipo: Precipitation
Reversível: Não
Energia: Exotérmico
ΔH: -35,0 kJ/mol

Reações relacionadas

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.