Calcium Hydroxide and Carbon Dioxide (Limewater Test)

Ca(OH)2 + CO2 → CaCO3 + H2O

Genel Bakış

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.

Katılımcılar

Rol Madde Katsayı Hal
Reaktan Calcium Hydroxide Ca(OH)₂ 1 (aq)
Reaktan Carbon Dioxide CO₂ 1 (g)
Ürün Calcium Carbonate CaCO₃ 1 (s)
Ürün Water H₂O 1 (l)

Günlük Örnek

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

Endüstriyel Önemi

This reaction is used in flue gas desulfurization, carbon capture, and in the production of precipitated calcium carbonate for paper and paint industries.

Özellikler

Tür
Double Replacement
Geri Dönüşümlü
Hayır
Enerji
Ekzotermik
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.