Inorganic Chemistry> preparation...
1 Answers
Dear student,
 |
|
|
Chemistry of Solvay tower
|
|
| CO2 reacts with ammonia to form ammonium carbonate. | |
|
2NH3 + CO2 + H2O è(NH4)2CO3
|
|
| Ammonium carbonate further reacts with CO2 to form ammonium bicarbonate. | |
|
(NH4)2CO3 + CO2 + H2O è2NH4HCO3 (aq.)
|
|
| Ammonium bicarbonate then react with NaCl to form sodium bicarbonate. | |
|
NH4HCO3 + NaCl èNaHCO3 + NH4Cl
|
|
| Due to exothermic nature of above reactions, solubility of NaHCO3 increases. To counter this effect , lower part of Solvay tower is cooled , ppt of NaHCO3 are separated by vacuum filtration and washed to remove ammonium salts. | |
|
Conversion of NaHCO3 to Na2 CO3
|
|
| Dry sodium bicarbonate is heated in rotary furnace called "CALCINER" to give anhydrous sodium carbonate or soda ash. Carbon dioxide is recirculated to carbonation tower. | |
|
2NaHCO3 èNa2 CO3 + CO2 + H2 O
|
|
|
Ammonia recovery process
|
|
| When CaCO3 is heated, CaO is obtained along with CO2 . CaO is treated with water to form Ca(OH)2 . | |
|
CaO + H2 O èCa(OH)2
|
|
| Quick lime is heated with NH4 Cl to form NH3 and calcium chloride (by product) . Ammonia is used again in this process. | |
|
2NH4 Cl + Ca(OH)2 èCaCl2 + 2NH3 + 2H2 O
|
|
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Last Activity: 3 Years ago
Last Activity: 3 Years ago
Last Activity: 3 Years ago
Last Activity: 3 Years ago
