Calcium Hydroxide and Sulfuric Acid

Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

Aperçu

Calcium hydroxide reacts with sulfuric acid to form calcium sulfate and water. The product calcium sulfate is a sparingly soluble salt that partially precipitates. This reaction produces gypsum (calcium sulfate dihydrate), one of the most important construction materials.

Participants

Rôle Substance Coefficient État
Réactif Calcium Hydroxide Ca(OH)₂ 1 (s)
Réactif Sulfuric Acid H₂SO₄ 1 (aq)
Produit Calcium Sulfate CaSO₄ 1 (s)
Produit Water H₂O 2 (l)

Exemple du quotidien

Gypsum board (drywall) used in virtually every modern building is made from calcium sulfate, which can be produced by this type of reaction.

Importance industrielle

Calcium sulfate (gypsum) is used in drywall, plaster, cement retarder, and as a food additive. Flue gas desulfurization uses lime to react with SO2, producing gypsum as a byproduct.

Propriétés

Type
Double Replacement
Réversible
Non
Énergie
Exothermique
ΔH
-109,0 kJ/mol

Réactions associées

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 Calcium Hydroxide and Carbon Dioxide (Limewater Test) Sodium Hydroxide and Iron(III) Chloride (Rust Color) Sodium Hydroxide and Hydrochloric Acid Neutralization Potassium Hydroxide and Sulfuric Acid Aluminum Hydroxide and Hydrochloric Acid

Frequently Asked Questions

What is the equation for Calcium Hydroxide and Sulfuric Acid?
The balanced equation is: Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O.
What type of reaction is Calcium Hydroxide and Sulfuric Acid?
Calcium Hydroxide and Sulfuric Acid is a double replacement reaction.
Is Calcium Hydroxide and Sulfuric Acid exothermic or endothermic?
Calcium Hydroxide and Sulfuric Acid is exothermic (releases energy). The enthalpy change (ΔH) is -109.0 kJ/mol.