1. CaO + H2O => Ca(OH)2
2. Ca(OH)2 + 2HCl => CaCl2 + 2H2O
3. CaCl2+ Na2CO3 => CaCO3⬇️ + 2NaCl
4. CaCO3 + H2O + CO2 => Ca(HCO3)2
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Answers & Comments
1. CaO + H2O => Ca(OH)2
2. Ca(OH)2 + 2HCl => CaCl2 + 2H2O
3. CaCl2+ Na2CO3 => CaCO3⬇️ + 2NaCl
4. CaCO3 + H2O + CO2 => Ca(HCO3)2