Question

The by product of Solvay-ammonia process is

• A. $CO_2$
• B. $NH_3$
• C. $CaCl_2$
• D. $CaCO_3$

Answer 1

Answer: (C)

$CaCl_2$

Answer 2

$CaCl _{2}$ is produced as a by-product in Solvay ammonia process:
$NaCl + CO _{2}+ NH _{3}+ H _{2} O \rightarrow NaHCO _{3}+ NH _{4} Cl$
$CaCO _{3} \rightarrow CO _{2}+ CaO$
$2 NH _{2} Cl + CaO \rightarrow 2 NH _{3}+\underset{\text { by product }}{ CaCl _{2}}+ H _{2} O$
Sodium carbonate is manufactured by Solvay ammonia process. The raw materials are brine $(NaCl)$, ammonia and carbon dioxide.