Is this a redox reaction?
4Cr+3O2 -> 2Cr2O3
Yes. Cr is oxidized, O2 is reduced.
Thanks
Yes, the reaction 4Cr + 3O2 -> 2Cr2O3 is a redox reaction.
Yes, the equation you provided is a redox reaction.
To determine whether a reaction is a redox reaction, you need to identify if there is a transfer of electrons between the reactants. In this case, the chromium (Cr) atoms undergo a change in oxidation state.
Initially, the chromium atoms have an oxidation state of +4 on the left side of the equation (Cr). However, in the product compound Cr2O3, the chromium atoms have an oxidation state of +3.
This change in oxidation state indicates the transfer of electrons. Chromium loses an electron in the reaction, which is represented as a decrease in its oxidation state from +4 to +3.
Therefore, the reaction you provided, 4Cr + 3O2 → 2Cr2O3, is a redox reaction.