Question

give equation for preparation of a calcium carbonate​

Answer 1

Answer:

Alternatively, calcium carbonate is prepared from calcium oxide. Water is added to give calcium hydroxide then carbon dioxide is passed through this solution to precipitate the desired calcium carbonate, referred to in the industry as precipitated calcium carbonate (PCC): CaO + H2O → Ca(OH) Ca(OH)2 + CO2 → CaCO3↓ + H2O.