What is ZnCl2? Important knowledge about ZnCl2.

1. Definition of ZnCl₂

1.1 Names
1.1.1 Common name: ZnCl₂ is commonly known as Zinc Chloride.
1.1.2 English name: ZnCl₂ is called Zinc Chloride in English.
1.2. Atomic mass: ZnCl₂ has an atomic mass of 95.39 g/mol.
1.3. Atomic composition: ZnCl₂ consists of one zinc atom (Zn) and two chlorine atoms (Cl).
1.3.1 Molecular structure: The ZnCl₂ molecule is composed of one zinc atom and two chlorine atoms.
1.4 Ionic structure: When dissolved in water, ZnCl₂ separates into Zn₂+ and Cl- ions.

2. Properties: ZnCl₂

2.1 Physical properties of ZnCl₂
State: Solid, white crystals.
Color: White.
Smell: No characteristic smell.
pH: When dissolved in water, ZnCl₂ creates an acidic environment, so the pH is less than 7.
2.2 Chemical properties of ZnCl₂: ZnCl₂ has the ability to react with various other compounds such as metals, acids, bases, non-metals, and salts.

3. Common chemical equations of ZnCl₂

3.1 Metal reactions

• Zn + 2HCl -> ZnCl₂ + H₂
• 2Al + 3ZnCl₂ -> 2AlCl₃ + 3Zn
• Cu + 2ZnCl₂ -> CuCl₂ + 2Zn

3.2 Acid reactions

• ZnCl₂ + H₂SO₄ -> ZnSO₄ + 2HCl
• Zn + 2HCl -> ZnCl₂ + H₂

4. Preparation of ZnCl₂

4.1 Laboratory preparation of ZnCl₂

• Through the reaction between zinc and hydrochloric acid: Zn + 2HCl -> ZnCl₂ + H₂
• The reaction between zinc and chlorine: Zn + Cl₂ -> ZnCl₂
  4.2 Industrial preparation of ZnCl₂: In industry, ZnCl₂ is usually produced from the reaction between zinc and hydrochloric acid.