Lead Carbonate Precipitation

Pb(NO3)2 + Na2CO3 → PbCO3↓ + 2NaNO3

概述

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.

参与者

角色 物质 系数 状态
反应物 Sodium Carbonate Na₂CO₃ 1 (aq)
产物 Sodium Nitrate NaNO₃ 2 (aq)

日常示例

White lead paint was used in homes for centuries before being banned due to lead poisoning, especially dangerous for children.

工业重要性

碳酸铅（铅白）因毒性已被TiO₂全面取代，但了解铅的沉淀化学对铅污染土壤和水体的修复治理（如磷酸固化铅）仍具重要工程意义。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-22.0 kJ/mol

相关反应

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.