Ferric Phosphate Precipitation (Water Treatment)

FeCl3 + Na3PO4 → FePO4↓ + 3NaCl

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Iron(III) Chloride FeCl₃ 1 (aq)
생성물 Sodium Chloride NaCl 3 (aq)

일상 속 예시

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

산업적 중요성

하수 처리장에서 인(P) 제거를 위한 화학적 침전법의 핵심 반응입니다. 수계의 부영양화와 녹조 발생을 방지하여 수질 환경 보전에 기여합니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-95.0 kJ/mol

관련 반응

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.