What is FeCl2? Important knowledge about FeCl2

1. Definition of FeCl₂

FeCl₂, also known as Iron (II) chloride in English, is a chemical compound formed from iron and chlorine atoms. The atomic mass of FeCl₂ is 126.75. Each molecule of FeCl₂ includes one iron atom and two chlorine atoms. The ionic composition of this substance consists of Fe₂+ ion and 2 Cl- ions.

2. Properties of FeCl₂

2.1 Physical properties of FeCl₂
FeCl₂ in solid state has a white to pale green color, lacks a distinctive smell and has a pH characteristic of a mild acid.
2.2 Chemical properties of FeCl₂
FeCl₂ has the ability to react with strong oxidizing agents to produce FeCl₃ and chlorine.

3. Common chemical equations of FeCl₂
   FeCl₂ is capable of reacting with iron in excess acid environment to produce FeCl₃, chlorine and hydrogen. In addition, FeCl₂ can also react with salts such as NaOH, Na₂CO₃,…

4. Preparation of FeCl₂

4.1 Laboratory preparation of FeCl₂
FeCl₂ can be prepared from the reaction between iron and excess hydrochloric acid.
4.2 Industrial preparation of FeCl₂
In industry, FeCl₂ is commonly produced by reacting iron with a mixture of hydrochloric acid and nitric acid.