Lead Carbonate Precipitation
Pb(NO3)2 + Na2CO3 → PbCO3↓ + 2NaNO3
概要
Lead nitrate reacts with sodium carbonate to form a white precipitate of lead carbonate (Ksp = 7.4 × 10⁻¹⁴). Basic lead carbonate (2PbCO₃·Pb(OH)₂), known as white lead, was the most important white pigment for millennia until its toxicity led to replacement by titanium dioxide.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Sodium Carbonate Na₂CO₃ | 1 | (aq) |
| 生成物 | Sodium Nitrate NaNO₃ | 2 | (aq) |
日常の例
White lead paint was used in homes for centuries before being banned due to lead poisoning, especially dangerous for children.
産業上の重要性
炭酸鉛（鉛白）は塗料でTiO₂に置き換えられた。鉛沈殿の理解は廃水処理、土壌浄化、旧来の鉛配管からの鉛汚染対策に現在も重要である。
特性
- タイプ
- Precipitation
- 可逆的
- いいえ
- エネルギー
- 発熱性
- ΔH
- -22.0 kJ/mol
関連する反応
Aluminum Hydroxide Precipitation
Barium Sulfate Precipitation
Cadmium Sulfide Precipitation (Yellow)
Calcium Phosphate Precipitation (Bone Mineral)
Chromium(III) Hydroxide Precipitation
Magnesium Hydroxide 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 Lead Carbonate Precipitation?
The balanced equation is: Pb(NO₃)₂ + Na₂CO₃ → PbCO₃↓ + 2NaNO₃.
What type of reaction is Lead Carbonate Precipitation?
Lead Carbonate Precipitation is a precipitation reaction.
Is Lead Carbonate Precipitation exothermic or endothermic?
Lead Carbonate Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -22.0 kJ/mol.