(1) Ca(OH)2+CO2===CaCO3↓+H2O CaCO3+H2O+CO2===Ca(HCO3)2
(2)Ca(OH)2+CO2===CaCO3↓+H2O
74 44 100
0.74 x 0.4
x=44×0.4÷100=0.176g
V=0.176÷44×100=0.0896L 该情况为Ca(OH)2为完全反应,溶液中通入了少量CO2
Ca(OH)2+CO2===CaCO3↓+H2O CaCO3+H2O+CO2===Ca(HCO3)2
74 44 100 100 44
0.74 x y 1-0.4 z
x=0.74×44÷74=0.44g
y=100×0.74÷74=1g
z=44×(1-0.4)÷100=0.264g
V=(0.44+0.264)÷44×22.4=0.3584L
该情况为Ca(OH)2完全反应,且通入过量的CO2,与CaCO3反应