\(n_{SO_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\\ n_{KOH}=1,2\cdot0,3=0,36\left(mol\right)\\ PTHH:SO_2+2KOH\rightarrow K_2SO_3+H_2O\)
Vì \(\dfrac{n_{SO_2}}{1}>\dfrac{n_{KOH}}{2}\) nên SO2 dư
\(\Rightarrow n_{K_2SO_3}=\dfrac{1}{2}n_{KOH}=0,18\left(mol\right)\\ \Rightarrow m_{K_2SO_3}=0,18\cdot158=28,44\left(g\right)\)