Calcium Sulfate Precipitation (Gypsum)

Ca(NO3)2 + Na2SO4 → CaSO4↓ + 2NaNO3

개요

Calcium nitrate reacts with sodium sulfate to precipitate calcium sulfate (Ksp = 4.9 × 10⁻⁵). CaSO₄ is sparingly soluble, not truly insoluble. The dihydrate form (CaSO₄·2H₂O) is gypsum, one of the most important construction materials. Plaster of Paris is the hemihydrate form.

참여 물질

역할 물질 계수 상태
반응물 Sodium Sulfate Na₂SO₄ 1 (aq)
생성물 Calcium Sulfate CaSO₄ 1 (s)
생성물 Sodium Nitrate NaNO₃ 2 (aq)

일상 속 예시

Drywall (gypsum board) used in nearly every building contains calcium sulfate dihydrate, produced by similar precipitation chemistry.

산업적 중요성

석고 생산량은 연간 2억 5천만 톤을 초과하며, 석고보드, 석고, 시멘트, 토양 개량제에 사용됩니다. 발전소의 배연탈황 석고가 점점 더 중요해지고 있습니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-8.0 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 Sulfate Precipitation (Gypsum)?
The balanced equation is: Ca(NO₃)₂ + Na₂SO₄ → CaSO₄↓ + 2NaNO₃.
What type of reaction is Calcium Sulfate Precipitation (Gypsum)?
Calcium Sulfate Precipitation (Gypsum) is a precipitation reaction.
Is Calcium Sulfate Precipitation (Gypsum) exothermic or endothermic?
Calcium Sulfate Precipitation (Gypsum) is exothermic (releases energy). The enthalpy change (ΔH) is -8.0 kJ/mol.