Ferric Phosphate Precipitation (Water Treatment)

FeCl₃ + Na₃PO₄ → FePO₄↓ + 3NaCl

Visão geral

Iron(III) chloride reacts with trisodium phosphate to form an insoluble yellowish-white precipitate of iron(III) phosphate (Ksp = 9.9 × 10⁻¹⁶). This precipitation is the primary method for removing phosphate from wastewater to prevent eutrophication of receiving waters.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Iron(III) Chloride FeCl₃	1	(aq)
Produto	Sodium Chloride NaCl	3	(aq)

Exemplo do cotidiano

Iron phosphate is used as an organic slug bait in gardens, sold under brand names like Sluggo. It is safe around pets and wildlife.

Importância industrial

A remoção de fosfato por precipitação com ferro(III) é um passo crítico no tratamento de águas residuais para prevenir a eutrofização. É amplamente utilizada em estações de tratamento de águas residuais em toda a Europa.

Propriedades

Tipo: Precipitation
Reversível: Não
Energia: Exotérmico
ΔH: -95,0 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 Ferric Phosphate Precipitation (Water Treatment)?

The balanced equation is: FeCl₃ + Na₃PO₄ → FePO₄↓ + 3NaCl.

What type of reaction is Ferric Phosphate Precipitation (Water Treatment)?

Ferric Phosphate Precipitation (Water Treatment) is a precipitation reaction.

Is Ferric Phosphate Precipitation (Water Treatment) exothermic or endothermic?

Ferric Phosphate Precipitation (Water Treatment) is exothermic (releases energy). The enthalpy change (ΔH) is -95.0 kJ/mol.