What is CrO3? Important knowledge about CrO3

  1. 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.

  2. 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.

  3. 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;

  4. 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.

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