Calcium Hydroxide and Carbon Dioxide (Limewater Test)

Ca(OH)2 + CO2 → CaCO3 + H2O

Descripción general

Calcium hydroxide solution (limewater) turns milky white when carbon dioxide is bubbled through it, due to the formation of insoluble calcium carbonate particles. This is the classic test for carbon dioxide gas. With excess CO2, the milkiness disappears as soluble calcium bicarbonate forms.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Calcium Hydroxide Ca(OH)₂ 1 (aq)
Reactivo Carbon Dioxide CO₂ 1 (g)
Producto Calcium Carbonate CaCO₃ 1 (s)
Producto Water H₂O 1 (l)

Ejemplo cotidiano

The limewater test is taught in every introductory chemistry course as the standard qualitative test for carbon dioxide gas.

Importancia industrial

Esta reacción se utiliza en la desulfuración de gases de combustión, captura de carbono y en la producción de carbonato de calcio precipitado para las industrias del papel y las pinturas.

Propiedades

Tipo
Double Replacement
Reversible
No
Energía
Exotérmico
ΔH
-113,0 kJ/mol

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Frequently Asked Questions

What is the equation for Calcium Hydroxide and Carbon Dioxide (Limewater Test)?
The balanced equation is: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O.
What type of reaction is Calcium Hydroxide and Carbon Dioxide (Limewater Test)?
Calcium Hydroxide and Carbon Dioxide (Limewater Test) is a double replacement reaction.
Is Calcium Hydroxide and Carbon Dioxide (Limewater Test) exothermic or endothermic?
Calcium Hydroxide and Carbon Dioxide (Limewater Test) is exothermic (releases energy). The enthalpy change (ΔH) is -113.0 kJ/mol.