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Carbonatul de calciu se poate obtine barbotand dioxid de carbon intr-o solutie de hidroxid de calciu. Ce cantitate de dioxid de carbon poate reactiona cu 240 g solutie de hidroxid de calciu de concentratie 10%

Răspuns :

CO2+Ca(OH)2=CaCO3+H2O
C=md/ms*100
md=ms*c/100=240*10/100=24 g Ca(OH)2
M Ca(OH)2=ACa+2AO+2AH=40+2*16+2*1=74g/mol
MCO2=AC+2AO=12+2*16=44g/mol
44 gCO2........................74gCa(OH)2
Xg..................................24g
X=24*44/74=14,27 g CO2