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Question
What can you say about the pH of a solution that liberates carbon dioxide from sodium carbonate?
Solution
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 : \[\ce{NaHCO3 + HCI → NaCI + H2O + CO2}\]
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