When slaked lime reacts with carbon dioxide in the air, calcium carbonate (CaCO3) is formed.
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When slaked lime (calcium hydroxide, Ca(OH)2) reacts with carbon dioxide (CO2) in the air, it undergoes a chemical reaction called carbonation or carbonation reaction. The reaction can be represented as follows:
Ca(OH)2 + CO2 → CaCO3 + H2O
In this reaction, calcium hydroxide reacts with carbon dioxide to form calcium carbonate (CaCO3) and water (H2O). This process is commonly observed when slaked lime, such as that used in construction materials like mortar and plaster, reacts with carbon dioxide present in the atmosphere, leading to the formation of calcium carbonate, which can result in the hardening and strengthening of the material over time.
When slaked lime (Ca(OH)2) reacts with carbon dioxide (CO₂) in the air, a chemical reaction known as carbonation takes place. The reaction can be represented as:
Ca(OH)₂(aq) + CO₂(g) → CaCO₃(s) + H₂O(l)
In this process, carbon dioxide reacts with the calcium hydroxide in slaked lime, forming calcium carbonate (CaCO3) and water (H2O). The calcium carbonate is a solid that may contribute to the hardening and whitening of surfaces, making it a significant reaction in applications such as the formation of geological structures and the creation of whitewashed walls.