What is Cu2S? Important Knowledge About Cu2S.

1. Definition of Cu₂S

Cu₂S, also known as Copper(I) sulfide, is a black solid. This substance is composed of 2 copper atoms and 1 sulfur atom. The atomic mass of copper is 29 and of sulfur is 16. Therefore, the atomic mass of Cu₂S is 29*2 +16 = 74. The ionic structure of this substance is Cu+ and S₂-.

2. Properties of Cu₂S

2.1 Physical properties of Cu₂S: Cu₂S is a solid in laboratory conditions, and it is black. This substance does not have a distinctive smell. The pH of Cu₂S cannot be determined because it is not soluble in water.
2.2 Chemical properties of Cu₂S: Cu₂S can react with strong oxidizing agents to produce SO₂ and CuO.

3. Common chemical equations of Cu₂S
   Reaction with oxygen: 2Cu₂S + 3O₂ -> 2Cu₂O + 2SO₂
   Reaction with strong acid: Cu₂S + 2H₂SO₄ -> 2CuSO₄ + H₂S

4. Synthesis of Cu₂S

4.1 Laboratory synthesis of Cu₂S:
Cu₂S can be synthesized by reacting Cu with H₂S:
2Cu + H₂S -> Cu₂S + H₂
4.2 Industrial synthesis of Cu₂S:
In industry, Cu₂S is commonly produced by the reaction between Cu and S at high temperature.