muối không tan là CaCO3
\(\Rightarrow\) nCaCO3= \(\frac{40}{100}\)= 0,4( mol)
PTPU
Ca(OH)2+ CO2\(\rightarrow\) CaCO3\(\downarrow\)+ H2O
.0,4.............0,4........0,4................ mol
\(\Rightarrow\) CM Ca(OH)2= \(\frac{0,4}{0,1}\)= 4M
theo PTPU có: nCO2= nCaCO3= 0,4( mol)
\(\Rightarrow\) %VCO2= \(\frac{0,4.22,4}{11,2}\). 100%= 80%