Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\\n_{Ba\left(OH\right)_2}=9\cdot0,05=0,45\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) Tạo 2 muối
PTHH: \(CO_2+Ba\left(OH\right)_2\rightarrow BaCO_3\downarrow+H_2O\) (1)
\(2CO_2+Ba\left(OH\right)_2\rightarrow Ba\left(HCO_3\right)_2\) (2)
Đặt \(\left\{{}\begin{matrix}n_{Ba\left(OH\right)_2\left(1\right)}=n_{BaCO_3}=a\left(mol\right)\\n_{Ba\left(OH\right)_2\left(2\right)}=b\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}a+b=0,45\\a+2b=0,75\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}a=n_{BaCO_3}=0,15\left(mol\right)\\b=0,3\end{matrix}\right.\)
\(\Rightarrow m_{BaCO_3}=0,15\cdot197=29,55\left(g\right)\)
