Ferric Phosphate Precipitation (Water Treatment)

FeCl₃ + Na₃PO₄ → FePO₄↓ + 3NaCl

Descripción general

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

Rol	Sustancia	Coeficiente	Estado
Reactivo	Iron(III) Chloride FeCl₃	1	(aq)
Producto	Sodium Chloride NaCl	3	(aq)

Ejemplo 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.

Importancia industrial

La eliminación de fosfato mediante precipitación con hierro(III) es un paso crítico en el tratamiento de aguas residuales en todo el mundo, previniendo florecimientos algales y la eutrofización.

Propiedades

Tipo: Precipitation
Reversible: No
Energía: Exotérmico
ΔH: -95,0 kJ/mol

Reacciones 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.