What is CrCl3? Important knowledge about CrCl3.

1. Definition of CrCl₃

CrCl₃, also known as Chromium(III) Chloride, is a chemical compound of chlorine and chromium. The compound has a molar mass of 266.45 g/mol, comprising of one chromium ion Cr₃+ and three chloride ions Cl−.

2. Properties of CrCl₃

2.1 Physical properties of CrCl₃
CrCl₃ exists as blue or green crystals, odorless, with a slightly acidic PH level.

2.2 Chemical properties of CrCl₃
CrCl₃ can react with water to form Cr(OH)₃ and HCl. It can also react with alkali metals to form chromium salts and hydrogen gas.

3. Common chemical equations of CrCl₃
   Below are some reactions for reference:

• CrCl₃ + 3NaOH -> Cr(OH)₃ + 3NaCl
• CrCl₃ + 3Fe -> Cr + 3FeCl₂
• CrCl₃ + 3H₂O -> Cr(OH)₃ + 3HCl
• CrCl₃ + Al -> Cr + AlCl₃
• CrCl₃ + H₂ -> Cr + 3HCl

4. Preparation of CrCl₃

4.1 Laboratory preparation of CrCl₃
CrCl₃ can be prepared from the reaction between chromium and chlorine, or chromium with hydrochloric acid.

4.2 Industrial preparation of CrCl₃
In industry, CrCl₃ is prepared by combining chromium with chlorine at high temperatures.