CBSE Class 11-science Answered

The Solvay process is used for the manufacture sodium carbonate Na₂CO₃ (washing soda). In this process, brine (NaCl), NH₃ and CO₂ are the raw materials.

The steps involved in this process are:

1. Purification of saturated brine

2. Reaction of saturated brine with gaseous ammonia

3. The ammoniated brine is carbonated with CO₂ to form NaHCO₃

4. NaHCO₃ is insoluble in brine solution. so it can be filtered out.

5. On heating, NaHCO₃ decomposes to Na₂CO₃

6. CaCO₃ is also used to provide CO₂

  Answered by | 27 Mar, 2014, 12:36: PM