PTHH: \(CaSO_3+H_2SO_4\rightarrow CaSO_4+H_2O+SO_2\uparrow\)
Ta có: \(n_{CaSO_3}=\dfrac{11,9}{120}\approx0,1\left(mol\right)=n_{CaSO_4}=n_{H_2SO_4}=n_{SO_2}\)
\(\Rightarrow\left\{{}\begin{matrix}m_{CaSO_4}=0,1\cdot136=13,6\left(g\right)\\m_{ddH_2SO_4}=\dfrac{0,1\cdot98}{5\%}=196\left(g\right)\\V_{SO_2}=0,1\cdot22,4=2,24\left(l\right)\end{matrix}\right.\)