Magnesium Hydroxide Precipitation
MgCl2 + 2NaOH → Mg(OH)2↓ + 2NaCl
Tổng quan
Magnesium chloride reacts with sodium hydroxide to form a white precipitate of magnesium hydroxide (Ksp = 5.6 × 10⁻¹²). The milky white suspension is commonly known as milk of magnesia. Mg(OH)₂ is a weak base that slowly neutralizes acid.
Người tham gia
| Vai trò | Chất | Hệ số | Trạng thái |
|---|---|---|---|
| Chất phản ứng | Sodium Hydroxide NaOH | 2 | (aq) |
| Sản phẩm | Magnesium Hydroxide Mg(OH)₂ | 1 | (s) |
| Sản phẩm | Sodium Chloride NaCl | 2 | (aq) |
Ví dụ thực tế
Milk of magnesia antacid is a suspension of this precipitate that neutralizes stomach acid gradually and acts as a gentle laxative.
Tầm quan trọng công nghiệp
Magnesium hydroxide is used as an antacid, flame retardant (replacing halogenated compounds), and in wastewater treatment for heavy metal removal.
Tính chất
- Loại
- Precipitation
- Thuận nghịch
- Không
- Năng lượng
- Tỏa nhiệt
- ΔH
- -41,0 kJ/mol
Phản ứng liên quan
Aluminum Hydroxide Precipitation
Barium Sulfate Precipitation
Cadmium Sulfide Precipitation (Yellow)
Calcium Phosphate Precipitation (Bone Mineral)
Chromium(III) Hydroxide Precipitation
Lead Carbonate Precipitation
Copper Sulfide Precipitation
Cobalt(II) Hydroxide Precipitation
Mercury(II) Sulfide Precipitation (Vermilion)
Iron(III) Hydroxide Precipitation
Frequently Asked Questions
What is the equation for Magnesium Hydroxide Precipitation?
The balanced equation is: MgCl₂ + 2NaOH → Mg(OH)₂↓ + 2NaCl.
What type of reaction is Magnesium Hydroxide Precipitation?
Magnesium Hydroxide Precipitation is a precipitation reaction.
Is Magnesium Hydroxide Precipitation exothermic or endothermic?
Magnesium Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -41.0 kJ/mol.