Home
Class 12
CHEMISTRY
Give preparation of ammonia....

Give preparation of ammonia.

Text Solution

Verified by Experts

Ammonia is present in small quantities in air and soil where it is formed by the decay of nitrogenous organic matter e.g. urea.
`H_(2)N -underset(O)underset(||)C - NH_(2) + 2H_(2)O to (NH_(4))_(2)CO_(2) On a small scale ammonia is obtained from ammonium salts which decompose when treated with caustic soda or calcium hydroxide.
`2NH_(4)Cl + Ca(OH)_(2) to 2NH_(3) +2H_(2)O + CaCl_(2)`
`(NH_(4))_(2)SO_(4) + 2NaOH to 2NH_(3) + 2H_(2)O + Na_(2)SO_(4)`
On large scale, ammonia is manufactured by Haber.s process
`N_(2)(g) + 3H_(2)(g) In accordance with Le-chatelier.s principle, high pressure would favour the formation of ammonia. The optimum conditions for the production of ammonia are a pressure of `200 xx 10^5` Pa (200 bar), a temperature of - 700 K and use of catalyst such as iron oxide with small amounts of `K_20` and `Al_2O_(3)` to increase the rate of attainment of equilibrium earlier molybdenum was used as promoter.
Promotional Banner

Topper's Solved these Questions

  • THE P-BLOCK ELEMENTS

    KUMAR PRAKASHAN|Exercise SECTION-A QUESTIONS (NITRIC ACID)|4 Videos

  • THE P-BLOCK ELEMENTS

    KUMAR PRAKASHAN|Exercise SECTION-A QUESTIONS (PHOSPHORUS - ALLOTROPIC FORMS)|1 Videos

  • THE P-BLOCK ELEMENTS

    KUMAR PRAKASHAN|Exercise SECTION-A QUESTIONS|16 Videos

  • THE D-AND F-BLOCK ELMENTS

    KUMAR PRAKASHAN|Exercise Section -E MCQs asked in GUJCET/Board Exams)|50 Videos

  • THE SOLID STATE

    KUMAR PRAKASHAN|Exercise SECTION - E (MULTIPLE CHOICE QUESTIONS)(MCQs ASKED IN BOARD EXAMS)|35 Videos