Ferric Phosphate Precipitation (Water Treatment)

FeCl3 + Na3PO4 → FePO4↓ + 3NaCl

概述

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.

参与者

角色 物质 系数 状态
反应物 Iron(III) Chloride FeCl₃ 1 (aq)
产物 Sodium Chloride NaCl 3 (aq)

日常示例

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

工业重要性

化学除磷是防止湖泊和水库富营养化的关键措施。铁盐（FeCl₃、FeSO₄）和铝盐是最常用的化学沉淀剂，全球每年处理数十亿升污水。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-95.0 kJ/mol

相关反应

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Magnesium Hydroxide Precipitation Copper Sulfide Precipitation Cobalt(II) Hydroxide 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.