Chemistry

This is a redox reaction in basic solution where aluminum is oxidized and nitrogen is reduced—you need to track electron transfer carefully. Split the reaction into oxidation and reduction half-reactions, balance atoms and charge in each using $\mathrm{H_2O}$ and $\mathrm{OH^-}$ (not $\mathrm{H^+}$, since it's basic), then multiply by factors to equalize electrons transferred before combining them back together.

This is a redox reaction in basic solution where aluminum is oxidized and nitrogen is reduced—you need to track electron transfer carefully. Split the reaction into oxidation and reduction half-reactions, balance atoms and charge in each using $\mathrm{H_2O}$ and $\mathrm{OH^-}$ (not $\mathrm{H^+}$, since it's basic), then multiply by factors to equalize electrons transferred before combining them back together.