Question

$N{a}_{2}C{O}_3$can be manufactured by Solvay process but $K_{2}C{O}_3$cannot be prepared because:

• A. K₂CO₃ is more soluble
• B. K₂CO₃ is less soluble
• C. KHCO₃ is more soluble than NaHCO₃
• D. KHCO₃ is less soluble than NaHCO₃

Answer 1

The correct option is C

KHCO₃ is more soluble than NaHCO₃

Solubility of $KHC{O}_3$ is more in water due to abnormally large atomic size of potassium when compared to that of $NaHC{O}_3$. Thus $KHC{O}_3$ cannot be filtered after the carbonation step.