Calcium Carbonate Precipitation

CaCl₂ + Na₂CO₃ → CaCO₃↓ + 2NaCl

Descripción general

Calcium chloride reacts with sodium carbonate to precipitate calcium carbonate. CaCO₃ has a Ksp of 3.4 × 10⁻⁹. This is the fundamental reaction behind water softening, where dissolved calcium (hardness) is removed as insoluble carbonate. The precipitate is a white powder.

Participantes

Rol	Sustancia	Coeficiente	Estado
Reactivo	Sodium Carbonate Na₂CO₃	1	(aq)
Producto	Calcium Carbonate CaCO₃	1	(s)
Producto	Sodium Chloride NaCl	2	(aq)

Ejemplo cotidiano

Limescale buildup in kettles and pipes is calcium carbonate precipitated from hard water when heated or evaporated.

Importancia industrial

El carbonato de calcio precipitado (PCC) se utiliza como carga en papel, en pinturas, plásticos y productos farmacéuticos. El ablandamiento del agua mediante precipitación de carbonatos es un importante proceso industrial.

Propiedades

Tipo: Precipitation
Reversible: No
Energía: Exotérmico
ΔH: -13,0 kJ/mol

Reacciones relacionadas

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Fluoride Precipitation (Fluorite) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Calcium Carbonate Precipitation?

The balanced equation is: CaCl₂ + Na₂CO₃ → CaCO₃↓ + 2NaCl.

What type of reaction is Calcium Carbonate Precipitation?

Calcium Carbonate Precipitation is a precipitation reaction.

Is Calcium Carbonate Precipitation exothermic or endothermic?

Calcium Carbonate Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -13.0 kJ/mol.