What is CaSO4? Important knowledge about CaSO4

Definition of CaSO₄
1.1. Nomenclature
1.1.1. The common name of CaSO₄ is gypsum.
1.1.2. The English name of CaSO₄ is Gypsum.
1.2. Atomic Structure
CaSO₄ consists of one calcium atom (Ca), one sulfur atom (S), and four oxygen atoms (O).
1.3. Atomic Mass
1.3.1 The molecular structure of CaSO₄ consists of one calcium molecule, one sulfur molecule, and four oxygen molecules. The atomic mass of CaSO₄ is 136.14 g/mol.
1.4. The ionic structure of CaSO₄ consists of calcium ions (Ca₂+) and sulfate ions (SO₄₂-).

Properties of CaSO₄
2.1. Physical properties of CaSO₄

• State: Solid
• Color: White or colorless
• Odor: Odorless
• pH: 7 (neither acidic nor alkaline)
  2.2. Chemical properties of CaSO₄: CaSO₄ is insoluble in water and dilute acid.

Common chemical equations of CaSO₄

• Reaction to form CaSO₄: Ca(OH)₂ + H₂SO₄ -> CaSO₄ + 2H₂O
• Reaction to form CaSO₄.1/2H2O: CaSO₄ + H₂O + CaSO₄ -> .1/2H2O
• Reaction to form CaSO₄.2H2O: CaSO₄ + 2H₂O + CaSO₄ -> .2H2O
• Reaction to form CaSO₄ from CaCl₂ and Na₂SO₄: CaCl₂ + Na₂SO₄ -> CaSO₄ + 2NaCl
• Reaction to form CaSO₄ from CaO and SO₂: CaO + SO₂ -> CaSO₄

Synthesis of CaSO₄
4.1. Laboratory Synthesis of CaSO₄: CaSO₄ can be synthesized from the reaction between calcium hydroxide and sulfuric acid.
4.2. Industrial Synthesis of CaSO₄: In industry, CaSO₄ is typically produced by heating gypsum at high temperatures to remove water, then cooling and refining.