Question

Write balanced chemical equations for the manufacture of nitric acid by Ostwald process.

Answer 1

The balanced Chemical equation for manufacture of nitric acid by Ostwald's process are as shown.
$4{\mathrm{NH}}_3\left(\mathrm{g}\right)+5{\mathrm{O}}_2\left(\mathrm{g}\right)\stackrel{\mathrm{Pt}/\mathrm{Rh}\mathrm{gauge}\mathrm{catalyst},500\mathrm{K},9\mathrm{bar}}{\to }4\mathrm{NO}\left(\mathrm{g}\right)+6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$
$2\mathrm{NO}\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\rightleftharpoons 2{\mathrm{NO}}_2\left(\mathrm{g}\right)$

$3{\mathrm{NO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\to 2{\mathrm{HNO}}_3\left(\mathrm{l}\right)+\mathrm{NO}\left(\mathrm{g}\right)$