-
Definition of CrO3
1.1 Names
1.1.1 Common name: Chromium trioxide
1.1.2 English name: Chromium trioxide
1.2 Atomic mass: 52.00 g/mol
1.3 Molecular mass: 100.00 g/mol
1.3.1 Molecular structure: The CrO3 molecule consists of 1 chromium atom (Cr) and 3 oxygen atoms (O).
1.4 Ion structure: CrO3 does not form ions in solution. -
Properties: CrO3
2.1 Physical properties of CrO3:
State: Solid at room temperature;
Color: Deep red or purple;
Odor: No specific odor;
PH level: This substance is a strong acid.
2.2 Chemical properties of CrO3: CrO3 primarily forms compounds with metals such as Potassium, Sodium to form Chromate or Dichromate. It can also form Chromate ions in solution. -
Common chemical reactions of CrO3:
Since CrO3 has strong oxidizing properties, its common reactions are oxidation-reduction reactions. Specific reactions include CrO3 + 3SO2 + 2H2O -> Cr(OH)3 + 3H2SO4; CrO3 + 2Al -> Al2O3 + Cr; -
Preparation of CrO3
4.1 Laboratory preparation of CrO3: CrO3 is typically prepared by oxidizing K2Cr2O7 with strong H2SO4 or HNO3 acid.
4.2 Industrial preparation of CrO3: In industry, CrO3 is usually produced from Chromite ore by oxidation in lime water.