Question

Give equations to obtain nitric oxide from nitric acid.

Answer 1

1. The formula of Nitric oxide is $\mathbf{NO}$ and Nitric acid is ${\mathbf{HNO}}_{\mathbf{3}}$.
2. In laboratories, the Nitric oxide($\mathbf{NO}$) is prepared by reduction of dilute Nitric acid (${\mathbf{HNO}}_{\mathbf{3}}$) with Copper metal ($\mathbf{Cu}$).
3. When dilute Nitric acid (${\mathbf{HNO}}_{\mathbf{3}}$) is added to Copper ($\mathbf{Cu}$) it reacts to form Copper(II) nitrate ($\mathbf{Cu}{\mathbf{\left(}{\mathbf{NO}}_{\mathbf{3}}\mathbf{\right)}}_{\mathbf{2}}$), water and Nitric oxide ($\mathbf{NO}$).
4. The reaction is shown below.
   $$\begin{gathered} 3\mathrm{Cu}\left(\mathrm{s}\right)+8{\mathrm{HNO}}_3\left(\mathrm{aq}\right)\to 3\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{aq}\right)+4{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+2\mathrm{NO}\left(\mathrm{l}\right) \\ \mathrm{Copper}\mathrm{Nitric}\mathrm{Copper}\left(\mathrm{II}\right)\mathrm{Nitric} \\ \mathrm{acid}\mathrm{nitrate}\mathrm{oxide} \end{gathered}$$