탄산칼슘 침전

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 탄산나트륨 Na₂CO₃ 1 (aq)
생성물 탄산칼슘 CaCO₃ 1 (s)
생성물 염화나트륨 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.

자주 묻는 질문

What is the equation for 탄산칼슘 침전?
The balanced equation is: CaCl₂ + Na₂CO₃ → CaCO₃↓ + 2NaCl.
What type of reaction is 탄산칼슘 침전?
탄산칼슘 침전 is a 침전 reaction.
Is 탄산칼슘 침전 exothermic or endothermic?
탄산칼슘 침전 is exothermic (releases energy). The enthalpy change (ΔH) is -13.0 kJ/mol.