Which of these processes involves using \(CO _{2}\) to produce \(Na _{2} CO _{3}\) ?
A. Solvay process B. Bosch process C. Frasch process D. Contact process
Correct Answer: A
Explanation
The starting materials in the solvay process for the manufacture of \(Na _{2} CO _{3}\) are ammoniacal brine (brine saturated with \(NH _{3}\) ) and \(CO _{2}\). \(H _{2} O + NH _{3}+ CO _{2} \rightarrow NH _{4} HCO _{3}\) \(NH _{4} HCO _{3}+ NaCl \rightarrow NH _{4} Cl + NaHCO _{3}\) \(2 NaHCO _{3} \underset{\Delta}{\stackrel{\text { heat }}{\longrightarrow}} Na _{2} CO _{3}+ H _{2} O + CO _{2}\)