Saved Bookmarks
| 1. |
Discuss the various reactions that occur in the Solvancy process. |
|
Answer» Solution :In Solvay AMMONIA process , `CO_(2)` is passed through brine , (i.e., a concentrated solution of NaCl) saturated with ammonia when sodium bicarbonate being sparingly soluble GETS precipitated . `NaCl + NH_(3) +CO_(2) + H_(2)O to NaHCO_(3) darr + NH_(4)Cl "" ... (i) ` Sodium bicarbonate THUS formed is filtered , dried and then heated when sodium carbonate is obtained . `2NaHCO_(3) overset(Delta)(to) Na_(2)CO_(3) + CO_(2) + H_(2)O` `CO_(2)` needed for the reaction shown in Eq. (i) is prepared by heating calcium carbonate and the quick lime , CaO thus formed is dissolved in water to form slaked lime , `Ca(OH)_(2)` `CaCO_(3) overset(Delta)(to) CaO + CO_(2) "" ... (ii) ` `CaO + H_(2)O to Ca(OH)_(2) "" ... (iii)` `NH_(3)` needed for the purpose is prepared by heating `NH_(4)Cl` obtained in Eq. (i) with `Ca(OH)_(2)` obtained in Eq. (iii) `2NH_(4)Cl + Ca(OH)_(2) to 2NH_(3) + CaCl_(2) + 2H_(2)O` Therefore , the only by product of the reaction is calcium chloride , `CaCl_(2)`. |
|