Lead Carbonate Precipitation

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

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。