Calcium Carbonate Precipitation

CaCl2 + Na2CO3 → CaCO3↓ + 2NaCl

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Sodium Carbonate Na₂CO₃ 1 (aq)
생성물 Calcium Carbonate CaCO₃ 1 (s)
생성물 Sodium Chloride NaCl 2 (aq)

일상 속 예시

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

산업적 중요성

침강성 탄산칼슘(PCC)은 종이 충전재, 페인트, 플라스틱, 그리고 의약품에 사용됩니다. 탄산염 침전에 의한 연수화는 주요 산업 공정입니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-13.0 kJ/mol

관련 반응

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.