Question

Name the metal oxide that can be reduced by Hydrogen.

Answer 1

1.Metal oxide reduction by hydrogen$\left({\mathrm{H}}_2\right)$

Metals of metal oxides that are present below Hydrogen$\left({\mathrm{H}}_2\right)$ in the reactivity series are reduced.

These metals are less reactive and have positive standard reduction potential value.

Therefore, reduction of metal takes place with Hydrogen.

2. The reduction reaction of metal oxide with Hydrogen is as follows:

The Copper oxide$\left(\mathrm{CuO}\right)$ reacts with Hydrogen$\left({\mathrm{H}}_2\right)$ gas and is reduced to Copper$\left(\mathrm{Cu}\right)$ along with the formation of water$\left({\mathrm{H}}_2\mathrm{O}\right)$.

The standard reduction potential of Copper is$+0.34V$.

$\mathrm{CuO}\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)\stackrel{}{\to }\mathrm{Cu}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

Therefore, the metal oxide that can be reduced by Hydrogen$\left({\mathrm{H}}_2\right)$ is Copper oxide$\left(\mathrm{CuO}\right)$.