Câu 1:
\(CO_2+Ba\left(OH\right)_2\rightarrow BaCO_3+H_2O\)
x_________x _______x ___________
\(2CO_2+Ba\left(OH\right)_2\rightarrow Ba\left(HCO_3\right)_2\)
y_________y/2____________
\(x+\frac{y}{2}=0,75\left(1\right)\)
\(klg_{dd\left(giam\right)}=klg_{kt}-klg_{CO2}\)
\(\Rightarrow5,45=197x-\left(x+y\right).44\left(2\right)\)
\(\left(1\right)+\left(2\right)\Rightarrow\left\{{}\begin{matrix}x=0,3\\y=0,9\end{matrix}\right.\)
\(\Rightarrow V=26,88\left(l\right)\)
Câu 2:
\(n_{SO2}=n_S=0,05\left(mol\right)\)
Cho 0,05mol SO2 vào 0,2 mol OH- thì tạo thành 0,05mol CO32-
\(\Rightarrow m_{\downarrow}=217.0,05=10,85\left(g\right)\)