Ferric Phosphate Precipitation (Water Treatment)

FeCl3 + Na3PO4 → FePO4↓ + 3NaCl

概要

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.

参加者

役割 物質 係数 状態
反応物 Iron(III) Chloride FeCl₃ 1 (aq)
生成物 Sodium Chloride NaCl 3 (aq)

日常の例

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

産業上の重要性

鉄(III)沈殿によるリン除去は世界中の廃水処理の重要工程であり、湖沼や河川の富栄養化防止に貢献する。塩化鉄と硫酸鉄の両方が凝集剤として利用される。

特性

タイプ
Precipitation
可逆的
いいえ
エネルギー
発熱性
ΔH
-95.0 kJ/mol

関連する反応

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.