What is CuCl2? Important knowledge about CuCl2.

1. Definition of CuCl₂

CuCl₂, also known as copper(II) chloride, is an inorganic compound of copper and chlorine with the chemical formula CuCl₂.

1.2. The molecular mass of CuCl₂ comprises 1 copper atom and 2 chlorine atoms.

1.3. The atomic mass of copper is 63.546 amu, and that of chlorine is 35.45 amu. Therefore, the molecular weight of CuCl₂ is 134.446 amu.

1.4. Ion structure: CuCl₂ is formed by the copper(II) ion Cu₂+ and two chloride ions Cl-.

2. Properties of CuCl₂

2.1. Physical properties of CuCl₂: CuCl₂ in the solid state is blue or green. It has no particular smell. The pH of CuCl₂ solution in water is neutral.

2.2. Chemical properties of CuCl₂: CuCl₂ is easily soluble in water and ethanol, forming a blue solution. CuCl₂ has a strong oxidizing and reducing ability.

3. Common chemical equations of CuCl₂: CuCl₂ can react with metals such as Fe, Zn to form new copper salts and new metals. It can also react with acids like sulfuric acid, nitric acid to form copper salts and gas.

4. Synthesis of CuCl₂
   4.1 Laboratory synthesis of CuCl₂: CuCl₂ is usually synthesized by reacting Cu with excess HCl in the air.
   4.2 Industrial synthesis of CuCl₂: In industry, CuCl₂ is typically produced by reacting CuO or Cu(OH)₂ with HCl.