Write the balanced chemical equation with condition involved in the manufacture of nitric acid by Ostwal's process .

Explanation

`4 NH_3 + 5O_2 (Pt//Rh 500 k)/("9 bar") 4 NO + 6H_2O`
`2NO + O_2 to 2NO_2`
`3NO_2 + H_2O to 2HNO_3 +NO`
Detailed Answer :
Manufacture of Nitric Acid (ostwald.s process) : This method was estabilished by Willhelm Ostawald.s (1902). In this method, `HNO_3` is manufactured by oxidation of ammonia. The main steps in this process are :
`2NH_3 + 5O_2 underset(500 K, "9 bar")overset("Pt/Rh gauge catalyst")to 4NO + 6H_2O`
`2NO(g) + O_2(g) hArr 2NO_2(g)`
`4NO_2 (g) + 2H_2O (l) + O_2(g) to 4HNO_3(aq)`