Question

Ca->Ca(OH)2->CaCO3-CaO->CaCO3​

Answer 1

Ответ:

Ca+2H2O=Ca(OH)2+H2

Ca(OH)2+H2CO3=CaCO3+2H2O

CaCO3=CaO+CO2

CaO+H2CO3=CaCO3+H2O

Объяснение:

Answer 2

The chemical reactions you've described involve the transformation of calcium (Ca) through several compounds. Let's go through each step:

1. Ca → Ca(OH)₂: This is the reaction where calcium (Ca) reacts with water (H₂O) to form calcium hydroxide (Ca(OH)₂), also known as slaked lime.

2. Ca(OH)₂ → CaCO₃: In this step, calcium hydroxide (Ca(OH)₂) undergoes a process called carbonation. It reacts with carbon dioxide (CO₂) from the atmosphere to form calcium carbonate (CaCO₃), which is commonly known as limestone.

3. CaCO₃ → CaO: This step involves heating calcium carbonate (CaCO₃) to a high temperature, which causes it to decompose into calcium oxide (CaO) and carbon dioxide (CO₂). The process is known as thermal decomposition or calcination.

4. CaO → CaCO₃: Lastly, calcium oxide (CaO), also known as quicklime, reacts with carbon dioxide (CO₂) from the air in a process called carbonation. This reaction forms calcium carbonate (CaCO₃) once again, completing the cycle.

The overall reaction pathway can be summarized as follows: Ca → Ca(OH)₂ → CaCO₃ → CaO → CaCO₃