수산화철(III) 침전

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 염화철(III) FeCl₃ 1 (aq)
반응물 수산화나트륨 NaOH 3 (aq)
생성물 염화나트륨 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.

자주 묻는 질문

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