Question

What can you say about the pH of a solution that liberates carbon dioxide from sodium carbonate?

Answer 1

The solution that liberates carbon dioxide from sodium carbonate has pH below 7 and hence acidic in nature. Since acids react with carbonates to liberate carbon dioxide gas as:

\[\ce{Carbonate + dil. Acid → Salt + Water + Carbon dioxide}\]

For example : \[\ce{NaHCO3 + HCI → NaCI + H2O + CO2}\]