- Definition of Cr2O3:
1.1 Names:
1.1.1 Common name: Cr2O3 is known as Chromium Iron.
1.1.2 English name: Chromium Iron is called Chromium(III) oxide or chromic oxide.
1.2. Atomic structure: Cr2O3 consists of 2 Chromium atoms and 3 Oxygen atoms.
1.3. Molar mass: The molar mass of Cr2O3 is 151.9904 g/mol.
1.3.1 Molecular structure: The molecule of Cr2O3 consists of 2 Chromium atoms linked to 3 Oxygen atoms.
1.4 Ionic structure: Cr2O3 does not form ions under normal conditions.
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Properties of Cr2O3:
2.1 Physical properties of Cr2O3:
State: Solid at room temperature.
Color: Green to black.
Smell: Odorless.
pH: Not applicable as Cr2O3 is a solid.
2.2 Chemical properties of Cr2O3: It is quite stable at high temperatures, insoluble in water and common acids. -
Common chemical reactions of Cr2O3:
3.1 Reaction with metals: Cr2O3 can react with metals like Al, Fe, Mg…
3.2 Reaction with acid: Cr2O3 reacts with strong acids like H2SO4, HCl.
3.3 Reaction with non-metals: Cr2O3 does not react with non-metals under normal conditions.
3.4 Reaction with salts: Cr2O3 does not react directly with salts. -
Synthesis of Cr2O3:
4.1 Laboratory synthesis of Cr2O3: Cr2O3 is typically synthesized from the reaction between CrCl3 and NaOH, then heated.
4.2 Industrial synthesis of Cr2O3: Industrially, Cr2O3 is produced by reducing Cr2O3 with coal in a sealed container.