NO2 + Na⁺ OH⁻ = Na⁺NO3⁻ + Na⁺NO2⁻<span> + H2O
</span> 1 |NO2 + 2OH⁻<span> – e</span>–<span> = NO</span>3⁻<span> + H</span>2<span>O
</span> 2 |NO2<span> + e</span>–<span> = NO</span>2⁻
2NO2 + 2OH⁻<span> = NO</span>3⁻<span> + NO</span>2⁻<span> + H</span>2<span>O
</span> +2Na +2Na
2NO2<span> + 2NaOH = NaNO</span>3<span> + NaNO</span>2<span> + H</span>2<span>O</span>