The equation 2Cr + 3O2 -> 2Cr2O3

1. Detailed information on the equation 2Cr + 3O₂ -> 2Cr₂O₃

The chemical equation above describes the chemical reaction process between the metal Chromium (Cr) and Oxygen gas (O₂) to form the compound Cr₂O₃, also known as Chromium Oxide.

• The left side of the equation, 2Cr + 3O₂ -> , represents the number of moles of the reactants, including 2 moles of Chromium and 3 moles of Oxygen.
• The right side of the equation, 2Cr₂O₃, represents the number of moles of the reaction product, which is 2 moles of Chromium Oxide.
• The arrow symbol (->) represents the transformation of the reactants into the products.

2. Reaction conditions

The reaction of Chromium with Oxygen usually occurs at high temperatures.

3. Reaction process

When Chromium is heated in air or in an Oxygen environment, it will combine with Oxygen to form Chromium Oxide. This process is called oxidation-reduction, a type of chemical reaction.

4. Occurring phenomena

When the reaction occurs, the initial silver-gray Chromium will turn into the characteristic green color of Chromium Oxide. If the reaction takes place at high temperatures, a green flame may be visible.