Carbon dioxide reacts with calcium hydroxide to produce a salt and water.
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The reaction between carbon dioxide (CO₂) and calcium hydroxide (Ca(OH)₂) results in the formation of calcium carbonate (CaCO₃). This reaction is a type of acid-base neutralization, where carbon dioxide, acting as a weak acid, reacts with the strong base calcium hydroxide. The chemical equation is:
CO₂(g) + Ca(OH)₂(aq) → CaCO₃(s) + H₂O(l)
Carbon dioxide dissolves in water to form carbonic acid (H₂CO₃), which then reacts with calcium hydroxide to produce the insoluble calcium carbonate. This reaction is utilized in various applications, such as carbon capture and in the treatment of flue gases in industries.