Iron(III) Hydroxide Precipitation

FeCl3 + 3NaOH → Fe(OH)3↓ + 3NaCl

개요

Iron(III) chloride reacts with sodium hydroxide to form a rust-brown gelatinous precipitate of iron(III) hydroxide. Fe(OH)₃ has an extremely low Ksp of 2.8 × 10⁻³⁹, precipitating even at slightly acidic pH. The gelatinous nature makes it an excellent flocculant for water treatment.

참여 물질

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

일상 속 예시

The rust-colored sludge in water treatment plants is mainly iron(III) hydroxide precipitated by adding base to iron-rich water.

산업적 중요성

광산 폐수 및 산업 폐수의 철 이온 제거에 사용됩니다. 수산화철은 중금속 이온 흡착 능력이 있어 폐수 처리의 응집·침전 공정에 활용됩니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-88.0 kJ/mol

관련 반응

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 Calcium Carbonate Precipitation Aluminum Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Iron(III) Hydroxide Precipitation?
The balanced equation is: FeCl₃ + 3NaOH → Fe(OH)₃↓ + 3NaCl.
What type of reaction is Iron(III) Hydroxide Precipitation?
Iron(III) Hydroxide Precipitation is a precipitation reaction.
Is Iron(III) Hydroxide Precipitation exothermic or endothermic?
Iron(III) Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -88.0 kJ/mol.