PTHH: $K_{2}$$O$ + $H_{2}$$O$ -> 2KOH (1)
a. PTHH: 2KOH + $SO_{2}$ -> $K_{2}$$SO_{3}$ + $H_{2}$$O$ (2)
Từ PTHH (1) => $n_{KOH}$ = $n_{K2O}$ = $\frac{9,4}{94}$ = 0,1 (mol)
Từ PTHH (2) => $n_{SO2}$ = $\frac{1}{2}$ $n_{KOH}$= 0,05 (mol)
=> $V_{SO2}$ = 1,12 (l)
b. PTHH: KOH + $SO_{2}$ -> $K$$HSO_{3}$ (3)
Từ PTHH (3) => $n_{SO2}$ = $n_{KOH}$= 0,1 (mol)
=> $V_{SO2}$ = 2,24 (l)
c. 1,12 ≤ $V_{SO2}$ ≤ 2,24