Ta có: \(\left\{{}\begin{matrix}n_{Ca\left(OH\right)_2}=0,2\cdot0,1=0,02\left(mol\right)\\n_{CO_2}=\dfrac{0,672}{22,4}=0,03\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) Tạo cả 2 muối
PTHH: \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\) (1)
\(2CO_2+Ca\left(OH\right)_2\rightarrow Ca\left(HCO_3\right)_2\) (2)
Đặt \(\left\{{}\begin{matrix}n_{Ca\left(OH\right)_2\left(1\right)}=n_{CaCO_3}=a\left(mol\right)\\n_{Ca\left(OH\right)_2\left(2\right)}=b\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}a+b=0,02\\a+2b=0,03\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}a=n_{CaCO_3}=0,01\left(mol\right)\\b=0,01\end{matrix}\right.\)
\(\Rightarrow m_{CaCO_3}=0,01\cdot100=1\left(g\right)\)