Calcium Hydroxide and Carbon Dioxide (Limewater Test)

Ca(OH)2 + CO2 → CaCO3 + H2O

نظرة عامة

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.

المشاركون

الدور المادة المعامل الحالة
متفاعل Calcium Hydroxide Ca(OH)₂ 1 (aq)
متفاعل Carbon Dioxide CO₂ 1 (g)
منتج Calcium Carbonate CaCO₃ 1 (s)
منتج Water H₂O 1 (l)

مثال من الحياة اليومية

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

الأهمية الصناعية

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

الخصائص

النوع
Double Replacement
قابل للعكس
لا
الطاقة
طارد للحرارة
ΔH
-113,0 kJ/mol

التفاعلات ذات الصلة

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.