Question

Na2CO3 is prepared by Solvay process but K2CO3 can not be prepared by the same because

• A. K2CO3 is highly soluble in H2O
• B. KHCO3 is slightly soluble
• C. KHCO3 is appreciably soluble
• D. KHCO3 decomposes

Answer 1

Answer: (C)

KHCO3 is appreciably soluble

Answer 2

The correct answer is option (C): KHCO3 is appreciably soluble

KHCO3 is more soluble than NaHCO3 is correct as the electropositive character increases on moving down the group, and the stability of bicarbonates increases in the same order. NaHCO3 is made by saturating a solution of sodium carbonate with carbon dioxide. The white crystalline powder of NaHCO3, being less soluble, gets separated out

Na2CO3 +H2O + CO2 $\rightarrow$2NaHCO3