How do limestone, quicklime, and slaked lime change?
Three: powdered lime in the air becomes "hard"Chemical formula: Ca (OH) 2+CO2=CaCO3: +H2OExperimental phenomenon: carbon dioxide gas is passed into clear lime water, and the solution becomes cloudy
Two change: lump of quicklime, water becomes "crisp.""Chemical equation: CaO+H2O=Ca (OH) 2Experimental phenomenon: a large amount of fog is produced, a large amount of heat is released, and a mass of solid is changed into a powder solid
1. The hard limestone turns brittle at high temperatures"Chemical formula: CaCO3= = =CaO+CO2 at high temperatureExperimental phenomenon: the burnt limestone becomes whiter and easier to crushRelated: calcined limestone to obtain quicklime
