What is As4S10? Important knowledge about As4S10.

Definition of As₄S₁₀
As₄S₁₀, also known as Tetraarsenic decasulfide or Realgar in English, is a chemical compound containing the elements As (Arsenic) and S (Sulfur). Each As₄S₁₀ molecule consists of 4 atoms of As and 10 atoms of S. The molar mass of this compound is 740.16 g/mol.

Properties of As₄S₁₀
2.1 Physical properties: As₄S₁₀ is solid in laboratory conditions, displaying a bright red color and no distinctive smell. Its pH cannot be determined as it is insoluble in water.
2.2 Chemical properties: As₄S₁₀ rarely reacts with other substances, showing no reaction with metals, acids, and salts. However, it can react with non-metals like O₂ in the air, forming As₂O₃ and SO₂.

Common chemical equation:
As₄S₁₀ + 5O₂ -> 2As₂O₃ + 5SO₂.
Note: The chemical equation is for reference only, students need to practice in the laboratory under the guidance of a teacher.

Preparation of As₄S₁₀
As₄S₁₀ is commonly prepared in the laboratory by heating a mixture of As and S in an air environment. In industry, As₄S₁₀ is produced in a similar manner but on a larger scale and requires specialized equipment.