Iron(III) Hydroxide Precipitation

FeCl₃ + 3NaOH → Fe(OH)₃↓ + 3NaCl

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Iron(III) Chloride FeCl₃	1	(aq)
Chất phản ứng	Sodium Hydroxide NaOH	3	(aq)
Sản phẩm	Sodium Chloride NaCl	3	(aq)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Iron(III) hydroxide precipitation is the primary method for iron removal from drinking water and is used as a coagulant in wastewater treatment.

Tính chất

Loại: Precipitation
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -88,0 kJ/mol

Phản ứng liên quan

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.