1) CO + H2O = CO2 + H2 (when carbon monoxide interacts with water, carbon dioxide and hydrogen are formed);
2) CO2 + Na2O = Na2CO3 (when carbon dioxide interacts with sodium oxide, sodium carbonate is formed);
3) Na2CO3 + Ca (OH) 2 = CaCO3 + 2NaOH (when sodium carbonate interacts with calcium hydroxide, calcium carbonate and sodium hydroxide are formed).
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