*Sửa đề: "25,65 gam Ba(OH)2"
Ta có: \(\left\{{}\begin{matrix}n_{SO_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\\n_{Ba\left(OH\right)_2}=\dfrac{25,65}{171}=0,15\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) Tạo 2 muối
PTHH: \(SO_2+Ba\left(OH\right)_2\rightarrow BaSO_3\downarrow+H_2O\)
a_________a_________a (mol)
\(2SO_2+Ba\left(OH\right)_2\rightarrow Ba\left(HSO_3\right)_2\)
2b________b_____________b (mol)
Ta lập HPT: \(\left\{{}\begin{matrix}a+b=0,15\\a+2b=0,2\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}a=0,1\\b=0,05\end{matrix}\right.\)
\(\Rightarrow m_{muối}=m_{BaSO_3}+m_{Ba\left(HSO_3\right)_2}=0,1\cdot217+0,05\cdot299=36,65\left(g\right)\)
