$n_{SO_2} = \dfrac{2,24}{22,4} = 0,1(mol0$
$SO_2 + Ca(OH)_2 \to CaSO_3 + H_2O$
$n_{Ca(OH)_2} = n_{SO_2} = 0,1(mol)$
$C_{M_{Ca(OH)_2}} = \dfrac{0,1}{0,2} = 0,5M$
$n_{CaSO_3} = 0,1.120 = 12(gam)$
\(n_{SO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ a,SO_2+Ca\left(OH\right)_2\rightarrow CaSO_3\downarrow+H_2O\\ n_{Ca\left(OH\right)_2}=n_{SO_2}=n_{CaSO_3}=0,1\left(mol\right)\\b, C_{MddCa\left(OH\right)_2}=\dfrac{0,1}{0,2}=0,5\left(M\right)\\ c,m_{CaSO_3}=120.0,1=12\left(g\right)\)