We’re being asked to identify the reducing agent in a reaction of magnesium with oxygen.
The reaction between magnesium metal and oxygen produces magnesium oxide as shown below:
2 Mg(s) + O2(g) → 2 MgO(s)
To do so, we need to identify the change in oxidation state for each element in the reaction.
Recall the mnemonic for redox reactions:
Explain how to identify the reducing agent in a reaction of magnesium with oxygen.
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