Calcium Hydroxide and Carbon Dioxide (Limewater Test)

Ca(OH)2 + CO2 → CaCO3 + H2O

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Calcium Hydroxide Ca(OH)₂ 1 (aq)
अभिकारक Carbon Dioxide CO₂ 1 (g)
उत्पाद Calcium Carbonate CaCO₃ 1 (s)
उत्पाद Water H₂O 1 (l)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार
Double Replacement
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माक्षेपी
ΔH
-113.0 kJ/mol

संबंधित अभिक्रियाएँ

Iron(III) Chloride and Sodium Hydroxide Ammonia and Hydrochloric Acid (White Smoke) Calcium Carbonate and Hydrochloric Acid Calcium Chloride and Sodium Carbonate Barium Chloride and Sodium Sulfate Precipitation Sodium Hydroxide and Iron(III) Chloride (Rust Color) Sodium Hydroxide and Hydrochloric Acid Neutralization Potassium Hydroxide and Sulfuric Acid Sodium Carbonate and Hydrochloric Acid Aluminum Hydroxide and Hydrochloric Acid

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.