Question

Write a balanced chemical equation for each of the following:

Reaction of ammonia with heated copper oxide.

Answer 1

Reduction of metallic oxides:

• Ammonia $\left({\mathrm{NH}}_3\right)$ reduces copper(II) oxide$\left(\mathrm{CuO}\right)$ into metallic copper.
• This reaction also liberates water vapors and nitrogen gas $\left({\mathrm{N}}_2\right)$.

Therefore, the balanced chemical equation is:

$3\mathrm{CuO}\left(\mathrm{s}\right)+2{\mathrm{NH}}_3\left(\mathrm{g}\right)⟶3\mathrm{Cu}\left(\mathrm{s}\right)+3{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{N}}_2\left(\mathrm{g}\right)\uparrow$