Complete and balance:
Mg(s) + NO3–(aq) →
Mg2+(aq) + NO2(g)
Use oxidation numbers to identify the oxidized and reduced species:
Mg(s) +
NO3–(aq)
→ Mg2+(aq)
+ NO2(g)
Ox. Nos.:0
N, +5; O, –2
+2
N, +4; O, –2
Magnesium is oxidized.
Nitrate is reduced.
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