Answer:
Balanced half-reaction: \(\frac{1}{2}O_{2}(g)+2e^{-}\rightarrow O^{2-}(aq.)\)
Explanation:
Formula of dioxygen : \(O_{2}\)
Formula of oxide ion: \(O^{2-}\)
First balance oxygen atoms: \(\frac{1}{2}O_{2}\rightarrow O^{2-}\)
Then balance charge: \(\frac{1}{2}O_{2}+2e^{-}\rightarrow O^{2-}\)
Then mention physical state of all species to get balanced half- reaction:
\(\frac{1}{2}O_{2}(g)+2e^{-}\rightarrow O^{2-}(aq.)\)
