Lead Carbonate Precipitation

Pb(NO₃)₂ + Na₂CO₃ → PbCO₃↓ + 2NaNO₃

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Sodium Carbonate Na₂CO₃	1	(aq)
Produto	Sodium Nitrate NaNO₃	2	(aq)

Exemplo do cotidiano

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

Importância industrial

O carbonato de chumbo (branco de chumbo) foi substituído pelo TiO₂ na tinta. A compreensão da precipitação do chumbo é importante para a remediação de solos contaminados com chumbo.

Propriedades

Tipo: Precipitation
Reversível: Não
Energia: Exotérmico
ΔH: -22,0 kJ/mol

Reações relacionadas

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.