CaO + CO2 → CaCO3

CaO + CO2 → CaCO3

CaO(s) + CO2(g) → CaCO3(s)

 

 

석회(lime)와 이산화탄소가 만나면 탄산칼슘이 만들어지나요?

 

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CaO는 염기성 산화물이고, CO2는 산성 산화물이므로,

( 설명 https://ywpop.tistory.com/6840 )

CaO와 CO2가 만나면, 비록 느리지만, 반응이 일어나서 CaCO3가 생성됩니다.

 

Calcium oxide react with carbon dioxide to produce calcium carbonate. The reaction proceeds at room temperature.

 

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The oldest uses of lime exploit its ability to react with carbon dioxide to regenerate calcium carbonate. When lime is mixed with water and sand, the result is mortar, which is used in construction to secure bricks, blocks, and stones together. Mortar is initially a stiff paste that is laid between the bricks. It gradually hardens, cementing the bricks together. At room temperature, the reaction of lime with carbon dioxide is very slow. It is speeded by mixing lime with water. When lime is mixed with water, it forms calcium hydroxide, called slaked lime.

1 단계: CaO(s) + H2O(l) → Ca(OH)2(s)

The reaction of calcium hydroxide with carbon dioxide is faster, producing a mortar that hardens more quickly.

2 단계: Ca(OH)2(s) + CO2(g) → CaCO3(s) + H2O(l)

 

 

[ 관련 글 https://ywpop.tistory.com/9683 ] 석회암, 생석회, 소석회.