Question

Explain using an example how can carbonate salts be prepared.

Answer 1

Carbonate salts can be prepared by reacting a metal hydroxide or metal oxide with carbon dioxide.

Example: Calcium carbonate is prepared by passing carbon dioxide through calcium hydroxide solution.

\[\ce{Ca(OH)2​ + CO2 ​-> CaCO3​ + H2​O}\]

Here, calcium carbonate (CaCO₃) is formed as a white precipitate.