Question

When ${\mathrm{HNO}}_3$ reacts with ${\mathrm{P}}_4{\mathrm{O}}_{10}$ the compounds formed is/are-

Answer 1

${\mathrm{P}}_4{\mathrm{O}}_{10}$:

• It is an oxide of the phosphorus compound.
• Its chemical name is phosphorous pentaoxide.
• It is also called an anhydride of phosphoric acid.
• It is a white crystalline solid
• It is a powerful dehydrating agent.

Reaction:

• When nitric acid reacts with phosphorous pentoxide gives dinitrogen pentaoxide and metaphosphoric acid.

$$\begin{gathered} 4{\mathrm{HNO}}_3\left(\mathrm{aq}\right)+{\mathrm{P}}_4{\mathrm{O}}_{10}\left(\mathrm{s}\right)\to 2{\mathrm{N}}_2{\mathrm{O}}_5\left(\mathrm{g}\right)+4{\mathrm{HPO}}_3\left(\mathrm{s}\right) \\ (\mathrm{Nitric}\mathrm{acid})(\mathrm{Phosphorous}(\mathrm{Dinitrogen}(\mathrm{Metaphosphoric} \\ \mathrm{pentoxide})\mathrm{pentoxide})\mathrm{acid}) \end{gathered}$$