given the reaction c + o₂ → co₂ which pair of reactions represents the two half - reactions?\nc →…

given the reaction c + o₂ → co₂ which pair of reactions represents the two half - reactions?\nc → co₂+4e⁻\no₂ + 4e⁻ → co₂\nc + 4e⁻ → co₂\no₂ → co₂+4e⁻\nc → co₂+2e⁻\no₂ + 2e⁻ → co₂\nc + 2e⁻ → co₂\no₂ → co₂+2e⁻

given the reaction c + o₂ → co₂ which pair of reactions represents the two half - reactions?\nc → co₂+4e⁻\no₂ + 4e⁻ → co₂\nc + 4e⁻ → co₂\no₂ → co₂+4e⁻\nc → co₂+2e⁻\no₂ + 2e⁻ → co₂\nc + 2e⁻ → co₂\no₂ → co₂+2e⁻

Answer

Explanation:

Step1: Analyze oxidation half - reaction

Carbon (C) has an oxidation state of 0 in elemental form. In $CO_2$, the oxidation state of C is +4. Oxidation is the loss of electrons. So the oxidation half - reaction for C is $C\rightarrow CO_2 + 4e^-$.

Step2: Analyze reduction half - reaction

Oxygen in $O_2$ has an oxidation state of 0. In $CO_2$, the oxidation state of O is - 2. Reduction is the gain of electrons. The reduction half - reaction for $O_2$ is $O_2+4e^-\rightarrow CO_2$ (after balancing the oxygen and charge in the context of the overall reaction).

Answer:

$C\rightarrow CO_2 + 4e^-$ $O_2+4e^-\rightarrow CO_2$