What is FeI3? Important knowledge about FeI3

1. Definition of FeI₃
   FeI₃, or iron (III) iodide, is a chemical compound of iron and iodine. In the FeI₃ molecule, one iron atom combines with three iodine atoms. FeI₃ belongs to the halogen compound group of iron and has not yet been found naturally in the environment.

1.1 Common name: Iron (III) iodide
1.1.2 English name: Iron (III) iodide
1.2 Atomic mass: Iron (Fe) has an atomic mass of 55.845, while iodine (I) has an atomic mass of 126.90447
1.3 The molecular mass of FeI₃ is the sum of the atomic masses of iron and iodine: 55.845 + 3*126.90447 = 436.65841.
1.4 Ion structure: FeI₃ is an ionic compound, in which iron forms the Fe₃+ ion and iodine forms the I- ion.

2. Properties of FeI₃
   2.1 Physical properties: FeI₃ is a solid, black and has no characteristic smell. The pH of FeI₃ solution is not clearly defined because this compound is not fully soluble in water.
   2.2 Chemical properties: FeI₃ can react with metals, acids, non-metals and salts under certain conditions.

3. Common chemical equations of FeI₃: due to the complex chemical properties of FeI₃, direct experiments need to be performed to understand the reactions that this compound may participate in.

4. Preparation of FeI₃
   FeI₃ can be prepared by having iodine react with iron in an airless environment. However, this process is very slow and requires high temperature. In industry, FeI₃ can be prepared from iron and iodine in a strong acid environment.