Yes, the reaction 2Ca(s) + O2(g) -> 2CaO(s) is a redox (reduction-oxidation) reaction.
In this reaction, calcium (Ca) is oxidized from an oxidation state of 0 to +2 (Ca -> Ca2+), while oxygen (O2) is reduced from an oxidation state of 0 to -2 (O2 -> 2O2-).
The reducing agent is the substance that undergoes oxidation, which in this case is Ca. The oxidizing agent is the substance that undergoes reduction, which in this case is O2.
Is 2Ca(s) + O2(g) —> 2CaO(s) a redox reaction? What is the reducing agent and what is the oxidizing agent?
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